Defining Hazardous Waste: Listed, Characteristic and Mixed Radiological Wastes

The Hazardous Waste Identification Process: Step 3 - Is the wasted listed or characteristic hazardous waste?

Click on a step in the hazardous waste
identification process for more information.

A solid waste is a hazardous waste if it is specifically listed as a known hazardous waste or meets the characteristics of a hazardous waste. Listed wastes are wastes from common manufacturing and industrial processes, specific industries and can be generated from discarded commercial products. Characteristic wastes are wastes that exhibit any one or more of the following characteristic properties: ignitability, corrosivity, reactivity or toxicity.

A waste that has a hazardous component and a radioactive component is called a mixed waste and is regulated under both the Resource Conservation and Recovery Act (RCRA) and the Atomic Energy Act.

On this page:


Listed Wastes

Recent Listing-Related Rulemakings

More information can be found for the following listing-related rulemakings:

A waste is determined to be a hazardous waste if it is specifically listed on one of four lists (the F, K, P and U lists) found in title 40 of the Code of Federal Regulations in part 261.

The F and K Lists

The F-list, found at 40 CFR section 261.31, identifies wastes from common manufacturing and industrial processes as hazardous. Because the processes generating these wastes can occur in different sectors of industry, the F list wastes are known as wastes from non-specific sources. They can be divided into seven groups depending on the type of manufacturing or industrial operation that creates them:

  • Spent solvent wastes,
  • Electroplating and other metal finishing wastes,
  • Dioxin-bearing wastes,
  • Chlorinated aliphatic hydrocarbons production,
  • Wood preserving wastes,
  • Petroleum refinery wastewater treatment sludges, and
  • Multisource leachate.

The K-list identifies hazardous wastes from specific sectors of industry and manufacturing and are considered source-specific wastes. To qualify as a K-listed hazardous waste, a waste must fit into one of the 13 categories on the list and the waste must match one of the detailed K list waste descriptions in 40 CFR section 261.32. the 13 industries that generate K list wastes are:

  •  

    Wood preservation,

  • Organic chemicals manufacturing,
  • Pesticides manufacturing,
  • Petroleum refining,
  • Veterinary pharmaceuticals manufacturing,
  • Inorganic pigment manufacturing,
  • Inorganic chemicals manufacturing,
  • Explosives manufacturing,
  • Iron and steel production,
  • Primary aluminum production,
  • Secondary lead processing,
  • Ink formulation, and
  • Coking (processing of coal to produce coke).
 

Use the table below to search for and sort by hazardous wastes listed on the F and K lists:

Industry and EPA Hazardous Waste NumberDescriptionHazard Code*
F001The following spent halogenated solvents used in degreasing: Tetrachloroethylene, trichloroethylene, methylene chloride, 1,1,1-trichloroethane, carbon tetrachloride, and chlorinated fluorocarbons; all spent solvent mixtures/blends used in degreasing containing, before use, a total of ten percent or more (by volume) of one or more of the above halogenated solvents or those solvents listed in F002, F004, and F005; and still bottoms from the recovery of these spent solvents and spent solvent mixtures(T)
F002The following spent halogenated solvents: Tetrachloroethylene, methylene chloride, trichloroethylene, 1,1,1-trichloroethane, chlorobenzene, 1,1,2-trichloro-1,2,2-trifluoroethane, ortho-dichlorobenzene, trichlorofluoromethane, and 1,1,2-trichloroethane; all spent solvent mixtures/blends containing, before use, a total of ten percent or more (by volume) of one or more of the above halogenated solvents or those listed in F001, F004, or F005; and still bottoms from the recovery of these spent solvents and spent solvent mixtures(T)
F003The following spent non-halogenated solvents: Xylene, acetone, ethyl acetate, ethyl benzene, ethyl ether, methyl isobutyl ketone, n-butyl alcohol, cyclohexanone, and methanol; all spent solvent mixtures/blends containing, before use, only the above spent non-halogenated solvents; and all spent solvent mixtures/blends containing, before use, one or more of the above non-halogenated solvents, and, a total of ten percent or more (by volume) of one or more of those solvents listed in F001, F002, F004, and F005; and still bottoms from the recovery of these spent solvents and spent solvent mixtures(I)
F004The following spent non-halogenated solvents: Cresols and cresylic acid, and nitrobenzene; all spent solvent mixtures/blends containing, before use, a total of ten percent or more (by volume) of one or more of the above non-halogenated solvents or those solvents listed in F001, F002, and F005; and still bottoms from the recovery of these spent solvents and spent solvent mixtures(T)
F005The following spent non-halogenated solvents: Toluene, methyl ethyl ketone, carbon disulfide, isobutanol, pyridine, benzene, 2-ethoxyethanol, and 2-nitropropane; all spent solvent mixtures/blends containing, before use, a total of ten percent or more (by volume) of one or more of the above non-halogenated solvents or those solvents listed in F001, F002, or F004; and still bottoms from the recovery of these spent solvents and spent solvent mixtures(I, T)
F006Wastewater treatment sludges from electroplating operations except from the following processes: (1) Sulfuric acid anodizing of aluminum; (2) tin plating on carbon steel; (3) zinc plating (segregated basis) on carbon steel; (4) aluminum or zinc-aluminum plating on carbon steel; (5) cleaning/stripping associated with tin, zinc and aluminum plating on carbon steel; and (6) chemical etching and milling of aluminum(T)
F007Spent cyanide plating bath solutions from electroplating operations(R, T)
F008Plating bath residues from the bottom of plating baths from electroplating operations where cyanides are used in the process(R, T)
F009Spent stripping and cleaning bath solutions from electroplating operations where cyanides are used in the process. Quenching bath residues from oil baths from metal heat treating operations where cyanides are used in the process(R, T)
F010Quenching bath residues from oil baths from metal heat treating operations where cyanides are used in the process(R, T)
F011Spent cyanide solutions from salt bath pot cleaning from metal heat treating operations(R, T)
F012Quenching waste water treatment sludges from metal heat treating operations where cyanides are used in the process(T)
F019Wastewater treatment sludges from the chemical conversion coating of aluminum except from zirconium phosphating in aluminum can washing when such phosphating is an exclusive conversion coating process. Wastewater treatment sludges from the manufacturing of motor vehicles using a zinc phosphating process will not be subject to this listing at the point of generation if the wastes are not placed outside on the land prior to shipment to a landfill for disposal and are either: disposed in a Subtitle D municipal or industrial landfill unit that is equipped with a single clay liner and is permitted, licensed or otherwise authorized by the state; or disposed in a landfill unit subject to, or otherwise meeting, the landfill requirements in §258.40, §264.301 or §265.301. For the purposes of this listing, motor vehicle manufacturing is defined in paragraph (b)(4)(i) of this section and (b)(4)(ii) of this section describes the recordkeeping requirements for motor vehicle manufacturing facilities(T)
F020Wastes (except wastewater and spent carbon from hydrogen chloride purification) from the production or manufacturing use (as a reactant, chemical intermediate, or component in a formulating process) of tri- or tetrachlorophenol, or of intermediates used to produce their pesticide derivatives. (This listing does not include wastes from the production of Hexachlorophene from highly purified 2,4,5-trichlorophenol.)(H)
F021Wastes (except wastewater and spent carbon from hydrogen chloride purification) from the production or manufacturing use (as a reactant, chemical intermediate, or component in a formulating process) of pentachlorophenol, or of intermediates used to produce its derivatives(H)
F022Wastes (except wastewater and spent carbon from hydrogen chloride purification) from the manufacturing use (as a reactant, chemical intermediate, or component in a formulating process) of tetra-, penta-, or hexachlorobenzenes under alkaline conditions(H)
F023Wastes (except wastewater and spent carbon from hydrogen chloride purification) from the production of materials on equipment previously used for the production or manufacturing use (as a reactant, chemical intermediate, or component in a formulating process) of tri- and tetrachlorophenols. (This listing does not include wastes from equipment used only for the production or use of Hexachlorophene from highly purified 2,4,5-trichlorophenol.)(H)
F024Process wastes, including but not limited to, distillation residues, heavy ends, tars, and reactor clean-out wastes, from the production of certain chlorinated aliphatic hydrocarbons by free radical catalyzed processes. These chlorinated aliphatic hydrocarbons are those having carbon chain lengths ranging from one to and including five, with varying amounts and positions of chlorine substitution. (This listing does not include wastewaters, wastewater treatment sludges, spent catalysts, and wastes listed in §261.31 or §261.32.)(T)
F025Condensed light ends, spent filters and filter aids, and spent desiccant wastes from the production of certain chlorinated aliphatic hydrocarbons, by free radical catalyzed processes. These chlorinated aliphatic hydrocarbons are those having carbon chain lengths ranging from one to and including five, with varying amounts and positions of chlorine substitution(T)
F026Wastes (except wastewater and spent carbon from hydrogen chloride purification) from the production of materials on equipment previously used for the manufacturing use (as a reactant, chemical intermediate, or component in a formulating process) of tetra-, penta-, or hexachlorobenzene under alkaline conditions(H)
F027Discarded unused formulations containing tri-, tetra-, or pentachlorophenol or discarded unused formulations containing compounds derived from these chlorophenols. (This listing does not include formulations containing Hexachlorophene sythesized from prepurified 2,4,5-trichlorophenol as the sole component.)(H)
F028Residues resulting from the incineration or thermal treatment of soil contaminated with EPA Hazardous Waste Nos. F020, F021, F022, F023, F026, and F027(T)
F032Wastewaters (except those that have not come into contact with process contaminants), process residuals, preservative drippage, and spent formulations from wood preserving processes generated at plants that currently use or have previously used chlorophenolic formulations (except potentially cross-contaminated wastes that have had the F032 waste code deleted in accordance with §261.35 of this chapter or potentially cross-contaminated wastes that are otherwise currently regulated as hazardous wastes (i.e., F034 or F035), and where the generator does not resume or initiate use of chlorophenolic formulations). This listing does not include K001 bottom sediment sludge from the treatment of wastewater from wood preserving processes that use creosote and/or pentachlorophenol(T)
F034Wastewaters (except those that have not come into contact with process contaminants), process residuals, preservative drippage, and spent formulations from wood preserving processes generated at plants that use creosote formulations. This listing does not include K001 bottom sediment sludge from the treatment of wastewater from wood preserving processes that use creosote and/or pentachlorophenol(T)
F035Wastewaters (except those that have not come into contact with process contaminants), process residuals, preservative drippage, and spent formulations from wood preserving processes generated at plants that use inorganic preservatives containing arsenic or chromium. This listing does not include K001 bottom sediment sludge from the treatment of wastewater from wood preserving processes that use creosote and/or pentachlorophenol(T)
F037Petroleum refinery primary oil/water/solids separation sludge—Any sludge generated from the gravitational separation of oil/water/solids during the storage or treatment of process wastewaters and oily cooling wastewaters from petroleum refineries. Such sludges include, but are not limited to, those generated in oil/water/solids separators; tanks and impoundments; ditches and other conveyances; sumps; and stormwater units receiving dry weather flow. Sludge generated in stormwater units that do not receive dry weather flow, sludges generated from non-contact once-through cooling waters segregated for treatment from other process or oily cooling waters, sludges generated in aggressive biological treatment units as defined in §261.31(b)(2) (including sludges generated in one or more additional units after wastewaters have been treated in aggressive biological treatment units) and K051 wastes are not included in this listing. This listing does include residuals generated from processing or recycling oil-bearing hazardous secondary materials excluded under §261.4(a)(12)(i), if those residuals are to be disposed of(T)
F038Petroleum refinery secondary (emulsified) oil/water/solids separation sludge—Any sludge and/or float generated from the physical and/or chemical separation of oil/water/solids in process wastewaters and oily cooling wastewaters from petroleum refineries. Such wastes include, but are not limited to, all sludges and floats generated in: induced air flotation (IAF) units, tanks and impoundments, and all sludges generated in DAF units. Sludges generated in stormwater units that do not receive dry weather flow, sludges generated from non-contact once-through cooling waters segregated for treatment from other process or oily cooling waters, sludges and floats generated in aggressive biological treatment units as defined in §261.31(b)(2) (including sludges and floats generated in one or more additional units after wastewaters have been treated in aggressive biological treatment units) and F037, K048, and K051 wastes are not included in this listing(T)
F039Leachate (liquids that have percolated through land disposed wastes) resulting from the disposal of more than one restricted waste classified as hazardous under subpart D of this part. (Leachate resulting from the disposal of one or more of the following EPA Hazardous Wastes and no other Hazardous Wastes retains its EPA Hazardous Waste Number(s): F020, F021, F022, F026, F027, and/or F028.)(T)
K001Bottom sediment sludge from the treatment of wastewaters from wood preserving processes that use creosote and/or pentachlorophenol(T)
K002Wastewater treatment sludge from the production of chrome yellow and orange pigments(T)
K003Wastewater treatment sludge from the production of molybdate orange pigments(T)
K004Wastewater treatment sludge from the production of zinc yellow pigments(T)
K005Wastewater treatment sludge from the production of chrome green pigments(T)
K006Wastewater treatment sludge from the production of chrome oxide green pigments (anhydrous and hydrated)(T)
K007Wastewater treatment sludge from the production of iron blue pigments(T)
K008Oven residue from the production of chrome oxide green pigments(T)
K009Distillation bottoms from the production of acetaldehyde from ethylene(T)
K010Distillation side cuts from the production of acetaldehyde from ethylene(T)
K011Bottom stream from the wastewater stripper in the production of acrylonitrile(R, T)
K013Bottom stream from the acetonitrile column in the production of acrylonitrile(R, T)
K014Bottoms from the acetonitrile purification column in the production of acrylonitrile(T)
K015Still bottoms from the distillation of benzyl chloride(T)
K016Heavy ends or distillation residues from the production of carbon tetrachloride(T)
K017Heavy ends (still bottoms) from the purification column in the production of epichlorohydrin(T)
K018Heavy ends from the fractionation column in ethyl chloride production(T)
K019Heavy ends from the distillation of ethylene dichloride in ethylene dichloride production(T)
K020Heavy ends from the distillation of vinyl chloride in vinyl chloride monomer production(T)
K021Aqueous spent antimony catalyst waste from fluoromethanes production(T)
K022Distillation bottom tars from the production of phenol/acetone from cumene(T)
K023Distillation light ends from the production of phthalic anhydride from naphthalene(T)
K024Distillation bottoms from the production of phthalic anhydride from naphthalene(T)
K025Distillation bottoms from the production of nitrobenzene by the nitration of benzene(T)
K026Stripping still tails from the production of methyl ethyl pyridines(T)
K027Centrifuge and distillation residues from toluene diisocyanate production(R, T)
K028Spent catalyst from the hydrochlorinator reactor in the production of 1,1,1-trichloroethane(T)
K029Waste from the product steam stripper in the production of 1,1,1-trichloroethane(T)
K030Column bottoms or heavy ends from the combined production of trichloroethylene and perchloroethylene(T)
K083Distillation bottoms from aniline production(T)
K085Distillation or fractionation column bottoms from the production of chlorobenzenes(T)
K093Distillation light ends from the production of phthalic anhydride from ortho-xylene(T)
K094Distillation bottoms from the production of phthalic anhydride from ortho-xylene(T)
K095Distillation bottoms from the production of 1,1,1-trichloroethane(T)
K096Heavy ends from the heavy ends column from the production of 1,1,1-trichloroethane(T)
K103Process residues from aniline extraction from the production of aniline(T)
K104Combined wastewater streams generated from nitrobenzene/aniline production(T)
K105Separated aqueous stream from the reactor product washing step in the production of chlorobenzenes(T)
K107Column bottoms from product separation from the production of 1,1-dimethylhydrazine (UDMH) from carboxylic acid hydrazides(C, T)
K108Condensed column overheads from product separation and condensed reactor vent gases from the production of 1,1-dimethylhydrazine (UDMH) from carboxylic acid hydrazides(I, T)
K109Spent filter cartridges from product purification from the production of 1,1-dimethylhydrazine (UDMH) from carboxylic acid hydrazides(T)
K110Condensed column overheads from intermediate separation from the production of 1,1-dimethylhydrazine (UDMH) from carboxylic acid hydrazides(T)
K111Product washwaters from the production of dinitrotoluene via nitration of toluene(C, T)
K112Reaction by-product water from the drying column in the production of toluenediamine via hydrogenation of dinitrotoluene(T)
K113Condensed liquid light ends from the purification of toluenediamine in the production of toluenediamine via hydrogenation of dinitrotoluene(T)
K114Vicinals from the purification of toluenediamine in the production of toluenediamine via hydrogenation of dinitrotoluene(T)
K115Heavy ends from the purification of toluenediamine in the production of toluenediamine via hydrogenation of dinitrotoluene(T)
K116Organic condensate from the solvent recovery column in the production of toluene diisocyanate via phosgenation of toluenediamine(T)
K117Wastewater from the reactor vent gas scrubber in the production of ethylene dibromide via bromination of ethene(T)
K118Spent adsorbent solids from purification of ethylene dibromide in the production of ethylene dibromide via bromination of ethene(T)
K136Still bottoms from the purification of ethylene dibromide in the production of ethylene dibromide via bromination of ethene(T)
K149Distillation bottoms from the production of alpha- (or methyl-) chlorinated toluenes, ring-chlorinated toluenes, benzoyl chlorides, and compounds with mixtures of these functional groups, (This waste does not include still bottoms from the distillation of benzyl chloride.)(T)
K150Organic residuals, excluding spent carbon adsorbent, from the spent chlorine gas and hydrochloric acid recovery processes associated with the production of alpha- (or methyl-) chlorinated toluenes, ring-chlorinated toluenes, benzoyl chlorides, and compounds with mixtures of these functional groups(T)
K151Wastewater treatment sludges, excluding neutralization and biological sludges, generated during the treatment of wastewaters from the production of alpha- (or methyl-) chlorinated toluenes, ring-chlorinated toluenes, benzoyl chlorides, and compounds with mixtures of these functional groups(T)
K156Organic waste (including heavy ends, still bottoms, light ends, spent solvents, filtrates, and decantates) from the production of carbamates and carbamoyl oximes. (This listing does not apply to wastes generated from the manufacture of 3-iodo-2-propynyl n-butylcarbamate.)(T)
K157Wastewaters (including scrubber waters, condenser waters, washwaters, and separation waters) from the production of carbamates and carbamoyl oximes. (This listing does not apply to wastes generated from the manufacture of 3-iodo-2-propynyl n-butylcarbamate.)(T)
K158Bag house dusts and filter/separation solids from the production of carbamates and carbamoyl oximes. (This listing does not apply to wastes generated from the manufacture of 3-iodo-2-propynyl n-butylcarbamate.)(T)
K159Organics from the treatment of thiocarbamate wastes(T)
K161Purification solids (including filtration, evaporation, and centrifugation solids), bag house dust and floor sweepings from the production of dithiocarbamate acids and their salts. (This listing does not include K125 or K126.)(R, T)
K174Wastewater treatment sludges from the production of ethylene dichloride or vinyl chloride monomer (including sludges that result from commingled ethylene dichloride or vinyl chloride monomer wastewater and other wastewater), unless the sludges meet the following conditions: (i) they are disposed of in a subtitle C or non-hazardous landfill licensed or permitted by the state or federal government; (ii) they are not otherwise placed on the land prior to final disposal; and (iii) the generator maintains documentation demonstrating that the waste was either disposed of in an on-site landfill or consigned to a transporter or disposal facility that provided a written commitment to dispose of the waste in an off-site landfill. Respondents in any action brought to enforce the requirements of subtitle C must, upon a showing by the government that the respondent managed wastewater treatment sludges from the production of vinyl chloride monomer or ethylene dichloride, demonstrate that they meet the terms of the exclusion set forth above. In doing so, they must provide appropriate documentation (e.g., contracts between the generator and the landfill owner/operator, invoices documenting delivery of waste to landfill, etc.) that the terms of the exclusion were met(T)
K175Wastewater treatment sludges from the production of vinyl chloride monomer using mercuric chloride catalyst in an acetylene-based process(T)
K181Nonwastewaters from the production of dyes and/or pigments (including nonwastewaters commingled at the point of generation with nonwastewaters from other processes) that, at the point of generation, contain mass loadings of any of the constituents identified in paragraph (c) of this section that are equal to or greater than the corresponding paragraph (c) levels, as determined on a calendar year basis. These wastes will not be hazardous if the nonwastewaters are: (i) disposed in a Subtitle D landfill unit subject to the design criteria in §258.40, (ii) disposed in a Subtitle C landfill unit subject to either §264.301 or §265.301, (iii) disposed in other Subtitle D landfill units that meet the design criteria in §258.40, §264.301, or §265.301, or (iv) treated in a combustion unit that is permitted under Subtitle C, or an onsite combustion unit that is permitted under the Clean Air Act. For the purposes of this listing, dyes and/or pigments production is defined in paragraph (b)(1) of this section. Paragraph (d) of this section describes the process for demonstrating that a facility's nonwastewaters are not K181. This listing does not apply to wastes that are otherwise identified as hazardous under §§261.21-261.24 and 261.31-261.33 at the point of generation. Also, the listing does not apply to wastes generated before any annual mass loading limit is met(T)
K071Brine purification muds from the mercury cell process in chlorine production, where separately prepurified brine is not used(T)
K073Chlorinated hydrocarbon waste from the purification step of the diaphragm cell process using graphite anodes in chlorine production(T)
K106Wastewater treatment sludge from the mercury cell process in chlorine production(T)
K176Wastewater treatment sludge from the mercury cell process in chlorine production(E)
K177Slag from the production of antimony oxide that is speculatively accumulated or disposed, including slag from the production of intermediates (e.g., antimony metal or crude antimony oxide)(T)
K178Residues from manufacturing and manufacturing-site storage of ferric chloride from acids formed during the production of titanium dioxide using the chloride-ilmenite process(T)
K031By-product salts generated in the production of MSMA and cacodylic acid(T)
K032Wastewater treatment sludge from the production of chlordane(T)
K033Wastewater and scrub water from the chlorination of cyclopentadiene in the production of chlordane(T)
K034Filter solids from the filtration of hexachlorocyclopentadiene in the production of chlordane(T)
K035Wastewater treatment sludges generated in the production of creosote(T)
K036Still bottoms from toluene reclamation distillation in the production of disulfoton(T)
K037Wastewater treatment sludges from the production of disulfoton(T)
K038Wastewater from the washing and stripping of phorate production(T)
K039Filter cake from the filtration of diethylphosphorodithioic acid in the production of phorate(T)
K040Wastewater treatment sludge from the production of phorate(T)
K041Wastewater treatment sludge from the production of toxaphene(T)
K042Heavy ends or distillation residues from the distillation of tetrachlorobenzene in the production of 2,4,5-T(T)
K0432,6-Dichlorophenol waste from the production of 2,4-D(T)
K097Vacuum stripper discharge from the chlordane chlorinator in the production of chlordane(T)
K098Untreated process wastewater from the production of toxaphene(T)
K099Untreated wastewater from the production of 2,4-D(T)
K123Process wastewater (including supernates, filtrates, and washwaters) from the production of ethylenebisdithiocarbamic acid and its salt(T)
K124Reactor vent scrubber water from the production of ethylenebisdithiocarbamic acid and its salts(C, T)
K125Filtration, evaporation, and centrifugation solids from the production of ethylenebisdithiocarbamic acid and its salts(T)
K126Baghouse dust and floor sweepings in milling and packaging operations from the production or formulation of ethylenebisdithiocarbamic acid and its salts(T)
K131Wastewater from the reactor and spent sulfuric acid from the acid dryer from the production of methyl bromide(C, T)
K132Spent absorbent and wastewater separator solids from the production of methyl bromide(T)
K044Wastewater treatment sludges from the manufacturing and processing of explosives(R)
K045Spent carbon from the treatment of wastewater containing explosives(R)
K046Wastewater treatment sludges from the manufacturing, formulation and loading of lead-based initiating compounds(T)
K047Pink/red water from TNT operations(R)
K048Dissolved air flotation (DAF) float from the petroleum refining industry(T)
K049Slop oil emulsion solids from the petroleum refining industry(T)
K050Heat exchanger bundle cleaning sludge from the petroleum refining industry(T)
K051API separator sludge from the petroleum refining industry(T)
K052Tank bottoms (leaded) from the petroleum refining industry(T)
K169Crude oil storage tank sediment from petroleum refining operations(T)
K170Clarified slurry oil tank sediment and/or in-line filter/separation solids from petroleum refining operations(T)
K171Spent Hydrotreating catalyst from petroleum refining operations, including guard beds used to desulfurize feeds to other catalytic reactors (this listing does not include inert support media)(I, T)
K172Spent Hydrorefining catalyst from petroleum refining operations, including guard beds used to desulfurize feeds to other catalytic reactors (this listing does not include inert support media)(I, T)
K061Emission control dust/sludge from the primary production of steel in electric furnaces(T)
K062Spent pickle liquor generated by steel finishing operations of facilities within the iron and steel industry (SIC Codes 331 and 332)(C, T)
K088Spent potliners from primary aluminum reduction(T)
K069Emission control dust/sludge from secondary lead smelting. (Note: This listing is stayed administratively for sludge generated from secondary acid scrubber systems. The stay will remain in effect until further administrative action is taken. If EPA takes further action effecting this stay, EPA will publish a notice of the action in the Federal Register)(T)
K100Waste leaching solution from acid leaching of emission control dust/sludge from secondary lead smelting(T)
K084Wastewater treatment sludges generated during the production of veterinary pharmaceuticals from arsenic or organoarsenic compounds(T)
K101Distillation tar residues from the distillation of aniline-based compounds in the production of veterinary pharmaceuticals from arsenic or organoarsenic compounds(T)
K102Residue from the use of activated carbon for decolorization in the production of veterinary pharmaceuticals from arsenic or organoarsenic compounds(T)
K086Solvent washes and sludges, caustic washes and sludges, or water washes and sludges from cleaning tubs and equipment used in the formulation of ink from pigments, driers, soaps, and stabilizers containing chromium and lead(T)
K060Ammonia still lime sludge from coking operations(T)
K087Decanter tank tar sludge from coking operations(T)
K141Process residues from the recovery of coal tar, including, but not limited to, collecting sump residues from the production of coke from coal or the recovery of coke by-products produced from coal. This listing does not include K087 (decanter tank tar sludges from coking operations)(T)
K142Tar storage tank residues from the production of coke from coal or from the recovery of coke by-products produced from coal(T)
K143Process residues from the recovery of light oil, including, but not limited to, those generated in stills, decanters, and wash oil recovery units from the recovery of coke by-products produced from coal(T)
K144Wastewater sump residues from light oil refining, including, but not limited to, intercepting or contamination sump sludges from the recovery of coke by-products produced from coal(T)
K145Residues from naphthalene collection and recovery operations from the recovery of coke by-products produced from coal(T)
K147Tar storage tank residues from coal tar refining(T)
K148Residues from coal tar distillation, including but not limited to, still bottoms(T)

*To indicate its reason for listing a waste, EPA assigns a hazard code to each waste listed on the F and K list. An explanation of each of the codes is below:

(T) - Toxic Waste
(H) - Acute Hazardous Waste
(I) - Ignitable Waste
(C) - Corrosive Waste
(R) - Reactive Waste
(E) - Toxicity Characteristic Waste

The first two hazard codes shown above apply to listed wastes whose constituents pose additional threat to human health and the environment. The last four hazard codes apply to wastes that have been listed because they typically exhibit one of the four regulatory characteristics of hazardous waste.

The P and U Lists

The P and U lists designate as hazardous waste pure and commercial grade formulations of certain unused chemicals that are being disposed of. For a waste to be considered a P- or U-listed waste it must meeting the following three criteria:

  • The waste must contain one of the chemicals listed on the P or U list;
  • The chemical in the waste must be unused; and
  • The chemical in the waste must be in the form of a commercial chemical product.

EPA defines a commercial chemical product for P and U list purposes as a chemical that is either 100 percent pure, technical (e.g., commercial) grade or the sole active ingredient in a chemical formulation.

The P-list identifies acute hazardous wastes from discarded commercial chemical products. The P-list can be found at 40 CFR section 261.33. The U-list identifies hazardous wastes from discarded commercial chemical products. The U-list wastes can be found at 40 CFR section 261.33.

Use the table below to search for and sort by hazardous wastes listed on the P and U lists:

Hazardous Waste No.Chemical Abstract No.Substance**
P001181-81-22H-1-Benzopyran-2-one, 4-hydroxy-3-(3-oxo-1-phenylbutyl)-, & salts, when present at concentrations greater than 0.3%
P001181-81-2Warfarin, & salts, when present at concentrations greater than 0.3%
P002591-08-2Acetamide, -(aminothioxomethyl)-
P002591-08-21-Acetyl-2-thiourea
P003107-02-8Acrolein
P003107-02-82-Propenal
P004309-00-2Aldrin
P004309-00-21,4,5,8-Dimethanonaphthalene, 1,2,3,4,10,10-hexa-chloro-1,4,4a,5,8,8a,-hexahydro-, (1alpha,4alpha,4abeta,5alpha,8alpha,8abeta)-
P005107-18-6Allyl alcohol
P005107-18-6 2-Propen-1-ol
P00620859-73-8Aluminum phosphide (R,T)
P0072763-96-45-(Aminomethyl)-3-isoxazolol
P0072763-96-43(2H)-Isoxazolone, 5-(aminomethyl)-
P008504-24-54-Aminopyridine
P008504-24-54-Pyridinamine
P009131-74-8Ammonium picrate (R)
P009131-74-8Phenol, 2,4,6-trinitro-, ammonium salt (R)
P0107778-39-4Arsenic acid H3 AsO4
P0111303-28-2Arsenic oxide As2 O5
P0111303-28-2Arsenic pentoxide
P0121327-53-3Arsenic oxide As2 O3
P0121327-53-3Arsenic trioxide
P013542-62-1Barium cyanide
P014108-98-5Benzenethiol
P014108-98-5Thiophenol
P0157440-41-7Beryllium powder
P016542-88-1Dichloromethyl ether
P016542-88-1Methane, oxybis[chloro-
P017598-31-2Bromoacetone
P017598-31-22-Propanone, 1-bromo-
P018357-57-3Brucine
P018357-57-3Strychnidin-10-one, 2,3-dimethoxy-
P02088-85-7Dinoseb
P02088-85-7Phenol, 2-(1-methylpropyl)-4,6-dinitro-
P021592-01-8Calcium cyanide
P021592-01-8Calcium cyanide Ca(CN)2
P02275-15-0Carbon disulfide
P023107-20-0Acetaldehyde, chloro-
P023107-20-0Chloroacetaldehyde
P024106-47-8Benzenamine, 4-chloro-
P024106-47-8p-Chloroaniline
P0265344-82-11-(o-Chlorophenyl)thiourea
P0265344-82-1Thiourea, (2-chlorophenyl)-
P027542-76-73-Chloropropionitrile
P027542-76-7Propanenitrile, 3-chloro-
P028100-44-7Benzene, (chloromethyl)-
P028100-44-7Benzyl chloride
P029544-92-3Copper cyanide
P029544-92-3Copper cyanide Cu(CN)
P030 Cyanides (soluble cyanide salts), not otherwise specified
P031460-19-5Cyanogen
P031460-19-5Ethanedinitrile
P033506-77-4Cyanogen chloride
P033506-77-4Cyanogen chloride (CN)Cl
P034131-89-52-Cyclohexyl-4,6-dinitrophenol
P034131-89-5Phenol, 2-cyclohexyl-4,6-dinitro-
P036696-28-6Arsonous dichloride, phenyl-
P036696-28-6Dichlorophenylarsine
P03760-57-1Dieldrin
P03760-57-12,7:3,6-Dimethanonaphth[2,3-b]oxirene, 3,4,5,6,9,9-hexachloro-1a,2,2a,3,6,6a,7,7a-octahydro-, (1aalpha,2beta,2aalpha,3beta,6beta,6aalpha,7beta, 7aalpha)-
P038692-42-2Arsine, diethyl-
P038692-42-2Diethylarsine
P039298-04-4Disulfoton
P039298-04-4Phosphorodithioic acid, O,O-diethyl S-[2-(ethylthio)ethyl] ester
P040297-97-2O,O-Diethyl O-pyrazinyl phosphorothioate
P040297-97-2Phosphorothioic acid, O,O-diethyl O-pyrazinyl ester
P041311-45-5Diethyl-p-nitrophenyl phosphate
P041311-45-5Phosphoric acid, diethyl 4-nitrophenyl ester
P04251-43-41,2-Benzenediol, 4-[1-hydroxy-2-(methylamino)ethyl]-, (R)-
P04251-43-4Epinephrine
P04355-91-4Diisopropylfluorophosphate (DFP)
P04355-91-4Phosphorofluoridic acid, bis(1-methylethyl) ester
P04460-51-5Dimethoate
P04460-51-5Phosphorodithioic acid, O,O-dimethyl S-[2-(methyl amino)-2-oxoethyl] ester
P04539196-18-42-Butanone, 3,3-dimethyl-1-(methylthio)-, O-[(methylamino)carbonyl] oxime
P04539196-18-4Thiofanox
P046122-09-8Benzeneethanamine, alpha,alpha-dimethyl-
P046122-09-8alpha,alpha-Dimethylphenethylamine
P0471534-52-14,6-Dinitro-o-cresol, & salts
P0471534-52-1Phenol, 2-methyl-4,6-dinitro-, & salts
P04851-28-52,4-Dinitrophenol
P04851-28-5Phenol, 2,4-dinitro-
P049541-53-7Dithiobiuret
P049541-53-7Thioimidodicarbonic diamide [(H2 N)C(S)]2 NH
P050115-29-7Endosulfan
P050115-29-76,9-Methano-2,4,3-benzodioxathiepin, 6,7,8,9,10,10-hexachloro-1,5,5a,6,9,9a-hexahydro-, 3-oxide
P051172-20-82,7:3,6-Dimethanonaphth [2,3-b]oxirene, 3,4,5,6,9,9-hexachloro-1a,2,2a,3,6,6a,7,7a-octahydro-, (1aalpha,2beta,2abeta,3alpha,6alpha,6abeta,7beta, 7aalpha)-, & metabolites
P05172-20-8Endrin
P05172-20-8Endrin, & metabolites
P054151-56-4Aziridine
P054151-56-4Ethyleneimine
P0567782-41-4Fluorine
P057640-19-7Acetamide, 2-fluoro-
P057640-19-7Fluoroacetamide
P05862-74-8Acetic acid, fluoro-, sodium salt
P05862-74-8Fluoroacetic acid, sodium salt
P05976-44-8Heptachlor
P05976-44-84,7-Methano-1H-indene, 1,4,5,6,7,8,8-heptachloro-3a,4,7,7a-tetrahydro-
P060465-73-61,4,5,8-Dimethanonaphthalene, 1,2,3,4,10,10-hexa-chloro-1,4,4a,5,8,8a-hexahydro-, (1alpha,4alpha,4abeta,5beta,8beta,8abeta)-
P060465-73-6Isodrin
P062757-58-4Hexaethyl tetraphosphate
P062757-58-4Tetraphosphoric acid, hexaethyl ester
P06374-90-8Hydrocyanic acid
P06374-90-8Hydrogen cyanide
P064624-83-9Methane, isocyanato-
P064624-83-9Methyl isocyanate
P065628-86-4Fulminic acid, mercury(2 + ) salt (R,T)
P065628-86-4Mercury fulminate (R,T)
P06616752-77-5Ethanimidothioic acid, N-[ [(methylamino)carbonyl]oxy]-, methyl ester
P06616752-77-5Methomyl
P06775-55-8Aziridine, 2-methyl-
P06775-55-81,2-Propylenimine
P06860-34-4Hydrazine, methyl-
P06860-34-4Methyl hydrazine
P06975-86-52-Methyllactonitrile
P06975-86-5Propanenitrile, 2-hydroxy-2-methyl-
P070116-06-3Aldicarb
P070116-06-3Propanal, 2-methyl-2-(methylthio)-, O-[(methylamino)carbonyl]oxime
P071298-00-0Methyl parathion
P071298-00-0Phosphorothioic acid, O,O,-dimethyl O-(4-nitrophenyl) ester
P07286-88-4alpha-Naphthylthiourea
P07286-88-4Thiourea, 1-naphthalenyl-
P07313463-39-3Nickel carbonyl
P07313463-39-3Nickel carbonyl Ni(CO)4, (T-4)-
P074557-19-7Nickel cyanide
P074557-19-7Nickel cyanide Ni(CN)2
P075154-11-5Nicotine, & salts
P075154-11-5Pyridine, 3-(1-methyl-2-pyrrolidinyl)-, (S)-, & salts
P07610102-43-9Nitric oxide
P07610102-43-9Nitrogen oxide NO
P077100-01-6Benzenamine, 4-nitro-
P077100-01-6p-Nitroaniline
P07810102-44-0Nitrogen dioxide
P07810102-44-0Nitrogen oxide NO2
P08155-63-0Nitroglycerine (R)
P08155-63-01,2,3-Propanetriol, trinitrate (R)
P08262-75-9Methanamine, -methyl-N-nitroso-
P08262-75-9N-Nitrosodimethylamine
P0844549-40-0N-Nitrosomethylvinylamine
P0844549-40-0Vinylamine, -methyl-N-nitroso-
P085152-16-9Diphosphoramide, octamethyl-
P085152-16-9Octamethylpyrophosphoramide
P08720816-12-0Osmium oxide OsO4, (T-4)-
P08720816-12-0Osmium tetroxide
P088145-73-3Endothall
P088145-73-37-Oxabicyclo[2.2.1]heptane-2,3-dicarboxylic acid
P08956-38-2Parathion
P08956-38-2Phosphorothioic acid, O,O-diethyl O-(4-nitrophenyl) ester
P09262-38-4Mercury, (acetato-O)phenyl-
P09262-38-4Phenylmercury acetate
P093103-85-5Phenylthiourea
P093103-85-5Thiourea, phenyl-
P094298-02-2Phorate
P094298-02-2Phosphorodithioic acid, O,O-diethyl S-[(ethylthio)methyl] ester
P09575-44-5Carbonic dichloride
P09575-44-5Phosgene
P0967803-51-2Hydrogen phosphide
P0967803-51-2Phosphine
P09752-85-7Famphur
P09752-85-7Phosphorothioic acid, O-[4-[(dimethylamino)sulfonyl]phenyl] O,O-dimethyl ester
P098151-50-8Potassium cyanide
P098151-50-8Potassium cyanide K(CN)
P099506-61-6Argentate(1-), bis(cyano-C)-, potassium
P099506-61-6Potassium silver cyanide
P101107-12-0Ethyl cyanide
P101107-12-0Propanenitrile
P102107-19-7Propargyl alcohol
P102107-19-72-Propyn-1-ol
P103630-10-4Selenourea
P104506-64-9Silver cyanide
P104506-64-9Silver cyanide Ag(CN)
P10526628-22-8Sodium azide
P106143-33-9Sodium cyanide
P106143-33-9Sodium cyanide Na(CN)
P1081157-24-9Strychnidin-10-one, & salts
P1081157-24-9Strychnine, & salts
P1093689-24-5Tetraethyldithiopyrophosphate
P1093689-24-5Thiodiphosphoric acid, tetraethyl ester
P11078-00-2Plumbane, tetraethyl-
P11078-00-2Tetraethyl lead
P111107-49-3Diphosphoric acid, tetraethyl ester
P111107-49-3Tetraethyl pyrophosphate
P112509-14-8Methane, tetranitro-(R)
P112509-14-8Tetranitromethane (R)
P1131314-32-5Thallic oxide
P1131314-32-5Thallium oxide Tl2 O3
P11412039-52-0Selenious acid, dithallium(1 + ) salt
P11412039-52-0Thallium(I) selenite
P1157446-18-6Sulfuric acid, dithallium(1+) salt
P1157446-18-6Thallium(I) sulfate
P11679-19-6Hydrazinecarbothioamide
P11679-19-6Thiosemicarbazide
P11875-70-7Methanethiol, trichloro-
P11875-70-7Trichloromethanethiol
P1197803-55-6Ammonium vanadate
P1197803-55-6Vanadic acid, ammonium salt
P1201314-62-1Vanadium oxide V2O5
P1201314-62-1Vanadium pentoxide
P121557-21-1Zinc cyanide
P121557-21-1Zinc cyanide Zn(CN)2
P1221314-84-7Zinc phosphide Zn3 P2, when present at concentrations greater than 10% (R,T)
P1238001-35-2Toxaphene
P1271563-66-27-Benzofuranol, 2,3-dihydro-2,2-dimethyl-, methylcarbamate.
P1271563-66-2Carbofuran
P128315-18-4Mexacarbate
P128315-18-4Phenol, 4-(dimethylamino)-3,5-dimethyl-, methylcarbamate (ester)
P18526419-73-81,3-Dithiolane-2-carboxaldehyde, 2,4-dimethyl-, O-[(methylamino)-carbonyl]oxime.
P18526419-73-8Tirpate
P18857-64-7Benzoic acid, 2-hydroxy-, compd. with (3aS-cis)-1,2,3,3a,8,8a-hexahydro-1,3a,8-trimethylpyrrolo[2,3-b]indol-5-yl methylcarbamate ester (1:1)
P18857-64-7Physostigmine salicylate
P18955285-14-8Carbamic acid, [(dibutylamino)-thio]methyl-, 2,3-dihydro-2,2-dimethyl-7-benzofuranyl ester
P18955285-14-8Carbosulfan
P1901129-41-5Carbamic acid, methyl-, 3-methylphenyl ester
P1901129-41-5Metolcarb
P191644-64-4Carbamic acid, dimethyl-, 1-[(dimethyl-amino)carbonyl]-5-methyl-1H-pyrazol-3-yl ester
P191644-64-4Dimetilan
P192119-38-0Carbamic acid, dimethyl-, 3-methyl-1-(1-methylethyl)-1H-pyrazol-5-yl ester
P192119-38-0Isolan
P19423135-22-0Ethanimidthioic acid, 2-(dimethylamino)-N-[ [(methylamino) carbonyl]oxy]-2-oxo-, methyl ester
P19423135-22-0Oxamyl
P19615339-36-3Manganese, bis(dimethylcarbamodithioato-S,S')-,
P19615339-36-3Manganese dimethyldithiocarbamate
P19717702-57-7Formparanate
P19717702-57-7Methanimidamide, N,N-dimethyl-N'-[2-methyl-4-[ [(methylamino)carbonyl]oxy]phenyl]-
P19823422-53-9Formetanate hydrochloride
P19823422-53-9Methanimidamide, N,N-dimethyl-N'-[3-[ [(methylamino)-carbonyl]oxy]phenyl]-monohydrochloride
P1992032-65-7Methiocarb
P1992032-65-7Phenol, (3,5-dimethyl-4-(methylthio)-, methylcarbamate
P2012631-37-0Phenol, 3-methyl-5-(1-methylethyl)-, methyl carbamate
P2012631-37-0Promecarb
P20264-00-6m-Cumenyl methylcarbamate
P20264-00-63-Isopropylphenyl N-methylcarbamate
P20264-00-6Phenol, 3-(1-methylethyl)-, methyl carbamate
P2031646-88-4Aldicarb sulfone
P2031646-88-4Propanal, 2-methyl-2-(methyl-sulfonyl)-, O-[(methylamino)carbonyl] oxime
P20457-47-6Physostigmine
P20457-47-6Pyrrolo[2,3-b]indol-5-ol, 1,2,3,3a,8,8a-hexahydro-1,3a,8-trimethyl-, methylcarbamate (ester), (3aS-cis)-
P205137-30-4Zinc, bis(dimethylcarbamodithioato-S,S')-,
P205137-30-4Ziram
U00175-07-0Acetaldehyde (I)
U00175-07-0Ethanal (I)
U00267-64-1Acetone (I)
U00267-64-12-Propanone (I)
U00375-05-8Acetonitrile (I,T)
U00498-86-2Acetophenone
U00498-86-2Ethanone, 1-phenyl-
U00553-96-3Acetamide, -9H-fluoren-2-yl-
U00553-96-32-Acetylaminofluorene
U00675-36-5Acetyl chloride (C,R,T)
U00779-06-1Acrylamide
U00779-06-12-Propenamide
U00879-10-7Acrylic acid (I)
U00879-10-72-Propenoic acid (I)
U009107-13-1Acrylonitrile
U009107-13-12-Propenenitrile
U01050-07-7Azirino[2',3':3,4]pyrrolo[1,2-a]indole-4,7-dione, 6-amino-8-[ [(aminocarbonyl)oxy]methyl]-1,1a,2,8,8a,8b-hexahydro-8a-methoxy-5-methyl-, [1aS-(1aalpha, 8beta,8aalpha,8balpha)]-
U01050-07-7Mitomycin C
U01161-82-5Amitrole
U01161-82-51H-1,2,4-Triazol-3-amine
U01262-53-3Aniline (I,T)
U01262-53-3Benzenamine (I,T)
U014492-80-8Auramine
U014492-80-8Benzenamine, 4,4'-carbonimidoylbis[N,N-dimethyl-
U015115-02-6Azaserine
U015115-02-6L-Serine, diazoacetate (ester)
U016225-51-4Benz[c]acridine
U01798-87-3Benzal chloride
U01798-87-3Benzene, (dichloromethyl)-
U01856-55-3Benz[a]anthracene
U01971-43-2Benzene (I,T)
U02098-09-9Benzenesulfonic acid chloride (C,R)
U02098-09-9Benzenesulfonyl chloride (C,R)
U02192-87-5Benzidine
U02192-87-5[1,1'-Biphenyl]-4,4'-diamine
U02250-32-8Benzo[a]pyrene
U02398-07-7Benzene, (trichloromethyl)-
U02398-07-7Benzotrichloride (C,R,T)
U024111-91-1Dichloromethoxy ethane
U024111-91-1Ethane, 1,1'-[methylenebis(oxy)]bis[2-chloro-
U025111-44-4Dichloroethyl ether
U025111-44-4Ethane, 1,1'-oxybis[2-chloro-
U026494-03-1Chlornaphazin
U026494-03-1Naphthalenamine, N,N'-bis(2-chloroethyl)-
U027108-60-1Dichloroisopropyl ether
U027108-60-1Propane, 2,2'-oxybis[2-chloro-
U028117-81-71,2-Benzenedicarboxylic acid, bis(2-ethylhexyl) ester
U028117-81-7Diethylhexyl phthalate
U02974-83-9Methane, bromo-
U02974-83-9Methyl bromide
U030101-55-3Benzene, 1-bromo-4-phenoxy-
U030101-55-34-Bromophenyl phenyl ether
U03171-36-31-Butanol (I)
U03171-36-3n-Butyl alcohol (I)
U03213765-19-0Calcium chromate
U03213765-19-0Chromic acid H2 CrO4, calcium salt
U033353-50-4Carbonic difluoride
U033353-50-4Carbon oxyfluoride (R,T)
U03475-87-6Acetaldehyde, trichloro-
U03475-87-6Chloral
U035305-03-3Benzenebutanoic acid, 4-[bis(2-chloroethyl)amino]-
U035305-03-3Chlorambucil
U03657-74-9Chlordane, alpha & gamma isomers
U03657-74-94,7-Methano-1H-indene, 1,2,4,5,6,7,8,8-octachloro-2,3,3a,4,7,7a-hexahydro-
U037108-90-7Benzene, chloro-
U037108-90-7Chlorobenzene
U038510-15-6Benzeneacetic acid, 4-chloro-alpha-(4-chlorophenyl)-alpha-hydroxy-, ethyl ester
U038510-15-6Chlorobenzilate
U03959-50-7p-Chloro-m-cresol
U03959-50-7Phenol, 4-chloro-3-methyl-
U041106-89-8Epichlorohydrin
U041106-89-8Oxirane, (chloromethyl)-
U042110-75-82-Chloroethyl vinyl ether
U042110-75-8Ethene, (2-chloroethoxy)-
U04375-01-4Ethene, chloro-
U04375-01-4Vinyl chloride
U04467-66-3Chloroform
U04467-66-3Methane, trichloro-
U04574-87-3Methane, chloro- (I,T)
U04574-87-3Methyl chloride (I,T)
U046107-30-2Chloromethyl methyl ether
U046107-30-2Methane, chloromethoxy-
U04791-58-7beta-Chloronaphthalene
U04791-58-7Naphthalene, 2-chloro-
U04895-57-8o-Chlorophenol
U04895-57-8Phenol, 2-chloro-
U0493165-93-3Benzenamine, 4-chloro-2-methyl-, hydrochloride
U0493165-93-34-Chloro-o-toluidine, hydrochloride
U050218-01-9Chrysene
U051 Creosote
U0521319-77-3Cresol (Cresylic acid)
U0521319-77-3Phenol, methyl-
U0534170-30-32-Butenal
U0534170-30-3Crotonaldehyde
U05598-82-8Benzene, (1-methylethyl)-(I)
U05598-82-8Cumene (I)
U056110-82-7Benzene, hexahydro-(I)
U056110-82-7Cyclohexane (I)
U057108-94-1Cyclohexanone (I)
U05850-18-0Cyclophosphamide
U05850-18-02H-1,3,2-Oxazaphosphorin-2-amine, N,N-bis(2-chloroethyl)tetrahydro-, 2-oxide
U05920830-81-3Daunomycin
U05920830-81-35,12-Naphthacenedione, 8-acetyl-10-[(3-amino-2,3,6-trideoxy)-alpha-L-lyxo-hexopyranosyl)oxy]-7,8,9,10-tetrahydro-6,8,11-trihydroxy-1-methoxy-, (8S-cis)-
U06072-54-8Benzene, 1,1'-(2,2-dichloroethylidene)bis[4-chloro-
U06072-54-8DDD
U06150-29-3Benzene, 1,1'-(2,2,2-trichloroethylidene)bis[4-chloro-
U06150-29-3DDT
U0622303-16-4Carbamothioic acid, bis(1-methylethyl)-, S-(2,3-di chloro-2-propenyl) ester
U0622303-16-4Diallate
U06353-70-3Dibenz[a,h]anthracene
U064189-55-9Benzo[rst]pentaphene
U064189-55-9Dibenzo[a,i]pyrene
U06696-12-81,2-Dibromo-3-chloropropane
U06696-12-8Propane, 1,2-dibromo-3-chloro-
U067106-93-4Ethane, 1,2-dibromo-
U067106-93-4Ethylene dibromide
U06874-95-3Methane, dibromo-
U06874-95-3Methylene bromide
U06984-74-21,2-Benzenedicarboxylic acid, dibutyl ester
U06984-74-2Dibutyl phthalate
U07095-50-1Benzene, 1,2-dichloro-
U07095-50-1o-Dichlorobenzene
U071541-73-1Benzene, 1,3-dichloro-
U071541-73-1m-Dichlorobenzene
U072106-46-7Benzene, 1,4-dichloro-
U072106-46-7p-Dichlorobenzene
U07391-94-1[1,1'-Biphenyl]-4,4'-diamine, 3,3'-dichloro-
U07391-94-13,3'-Dichlorobenzidine
U074764-41-02-Butene, 1,4-dichloro-(I,T)
U074764-41-01,4-Dichloro-2-butene (I,T)
U07575-71-8Dichlorodifluoromethane
U07575-71-8Methane, dichlorodifluoro-
U07675-34-3Ethane, 1,1-dichloro-
U07675-34-3Ethylidene dichloride
U077107-06-2Ethane, 1,2-dichloro-
U077107-06-2Ethylene dichloride
U07875-35-41,1-Dichloroethylene
U07875-35-4Ethene, 1,1-dichloro-
U079156-60-51,2-Dichloroethylene
U079156-60-5Ethene, 1,2-dichloro-, (E)-
U08075-09-2Methane, dichloro-
U08075-09-2Methylene chloride
U081120-83-22,4-Dichlorophenol
U081120-83-2Phenol, 2,4-dichloro-
U08287-65-02,6-Dichlorophenol
U08287-65-0Phenol, 2,6-dichloro-
U08378-87-5Propane, 1,2-dichloro-
U08378-87-5Propylene dichloride
U084542-75-61,3-Dichloropropene
U084542-75-61-Propene, 1,3-dichloro-
U0851464-53-52,2'-Bioxirane
U0851464-53-51,2:3,4-Diepoxybutane (I,T)
U0861615-80-1N,N'-Diethylhydrazine
U0861615-80-1Hydrazine, 1,2-diethyl-
U0873288-58-2O,O-Diethyl S-methyl dithiophosphate
U0873288-58-2Phosphorodithioic acid, O,O-diethyl S-methyl ester
U08884-66-21,2-Benzenedicarboxylic acid, diethyl ester
U08884-66-2Diethyl phthalate
U08956-53-1Diethylstilbesterol
U08956-53-1Phenol, 4,4'-(1,2-diethyl-1,2-ethenediyl)bis-, (E)-
U09094-58-61,3-Benzodioxole, 5-propyl-
U09094-58-6Dihydrosafrole
U091119-90-4[1,1'-Biphenyl]-4,4'-diamine, 3,3'-dimethoxy-
U091119-90-43,3'-Dimethoxybenzidine
U092124-40-3Dimethylamine (I)
U092124-40-3Methanamine, -methyl-(I)
U09360-11-7Benzenamine, N,N-dimethyl-4-(phenylazo)-
U09360-11-7p-Dimethylaminoazobenzene
U09457-97-6Benz[a]anthracene, 7,12-dimethyl-
U09457-97-67,12-Dimethylbenz[a]anthracene
U095119-93-7[1,1'-Biphenyl]-4,4'-diamine, 3,3'-dimethyl-
U095119-93-73,3'-Dimethylbenzidine
U09680-15-9alpha,alpha-Dimethylbenzylhydroperoxide (R)
U09680-15-9Hydroperoxide, 1-methyl-1-phenylethyl-(R)
U09779-44-7Carbamic chloride, dimethyl-
U09779-44-7Dimethylcarbamoyl chloride
U09857-14-71,1-Dimethylhydrazine
U09857-14-7Hydrazine, 1,1-dimethyl-
U099540-73-81,2-Dimethylhydrazine
U099540-73-8Hydrazine, 1,2-dimethyl-
U101105-67-92,4-Dimethylphenol
U101105-67-9Phenol, 2,4-dimethyl-
U102131-11-31,2-Benzenedicarboxylic acid, dimethyl ester
U102131-11-3Dimethyl phthalate
U10377-78-1Dimethyl sulfate
U10377-78-1Sulfuric acid, dimethyl ester
U105121-14-2Benzene, 1-methyl-2,4-dinitro-
U105121-14-22,4-Dinitrotoluene
U106606-20-2Benzene, 2-methyl-1,3-dinitro-
U106606-20-22,6-Dinitrotoluene
U107117-84-01,2-Benzenedicarboxylic acid, dioctyl ester
U107117-84-0Di-n-octyl phthalate
U108123-91-11,4-Diethyleneoxide
U108123-91-11,4-Dioxane
U109122-66-71,2-Diphenylhydrazine
U109122-66-7Hydrazine, 1,2-diphenyl-
U110142-84-7Dipropylamine (I)
U110142-84-71-Propanamine, N-propyl-(I)
U111621-64-7Di-n-propylnitrosamine
U111621-64-71-Propanamine, N-nitroso-N-propyl-
U112141-78-6Acetic acid ethyl ester (I)
U112141-78-6Ethyl acetate (I)
U113140-88-5Ethyl acrylate (I)
U113140-88-52-Propenoic acid, ethyl ester (I)
U1141111-54-6Carbamodithioic acid, 1,2-ethanediylbis-, salts & esters
U1141111-54-6Ethylenebisdithiocarbamic acid, salts & esters
U11575-21-8Ethylene oxide (I,T)
U11575-21-8Oxirane (I,T)
U11696-45-7Ethylenethiourea
U11696-45-72-Imidazolidinethione
U11760-29-7Ethane, 1,1'-oxybis-(I)
U11760-29-7Ethyl ether (I)
U11897-63-2Ethyl methacrylate
U11897-63-22-Propenoic acid, 2-methyl-, ethyl ester
U11962-50-0Ethyl methanesulfonate
U11962-50-0Methanesulfonic acid, ethyl ester
U120206-44-0Fluoranthene
U12175-69-4Methane, trichlorofluoro-
U12175-69-4Trichloromonofluoromethane
U12250-00-0Formaldehyde
U12364-18-6Formic acid (C,T)
U124110-00-9Furan (I)
U124110-00-9Furfuran (I)
U12598-01-12-Furancarboxaldehyde (I)
U12598-01-1Furfural (I)
U126765-34-4Glycidylaldehyde
U126765-34-4Oxiranecarboxyaldehyde
U127118-74-1Benzene, hexachloro-
U127118-74-1Hexachlorobenzene
U12887-68-31,3-Butadiene, 1,1,2,3,4,4-hexachloro-
U12887-68-3Hexachlorobutadiene
U12958-89-9Cyclohexane, 1,2,3,4,5,6-hexachloro-, (1alpha,2alpha,3beta,4alpha,5alpha,6beta)-
U12958-89-9Lindane
U13077-47-41,3-Cyclopentadiene, 1,2,3,4,5,5-hexachloro-
U13077-47-4Hexachlorocyclopentadiene
U13167-72-1Ethane, hexachloro-
U13167-72-1Hexachloroethane
U13270-30-4Hexachlorophene
U13270-30-4Phenol, 2,2'-methylenebis[3,4,6-trichloro-
U133302-01-2Hydrazine (R,T)
U1347664-39-3Hydrofluoric acid (C,T)
U1347664-39-3Hydrogen fluoride (C,T)
U1357783-06-4Hydrogen sulfide
U1357783-06-4Hydrogen sulfide H2S
U13675-60-5Arsinic acid, dimethyl-
U13675-60-5Cacodylic acid
U137193-39-5Indeno[1,2,3-cd]pyrene
U13874-88-4Methane, iodo-
U13874-88-4Methyl iodide
U14078-83-1Isobutyl alcohol (I,T)
U14078-83-11-Propanol, 2-methyl- (I,T)
U141120-58-11,3-Benzodioxole, 5-(1-propenyl)-
U141120-58-1Isosafrole
U142143-50-0Kepone
U142143-50-01,3,4-Metheno-2H-cyclobuta[cd]pentalen-2-one, 1,1a,3,3a,4,5,5,5a,5b,6-decachlorooctahydro-
U143303-34-42-Butenoic acid, 2-methyl-, 7-[ [2,3-dihydroxy-2-(1-methoxyethyl)-3-methyl-1-oxobutoxy]methyl]-2,3,5,7a-tetrahydro-1H-pyrrolizin-1-yl ester, [1S-[1alpha(Z),7(2S*,3R*),7aalpha] ]-
U143303-34-4Lasiocarpine
U144301-04-2Acetic acid, lead(2 + ) salt
U144301-04-2Lead acetate
U1457446-27-7Lead phosphate
U1457446-27-7Phosphoric acid, lead(2 + ) salt (2:3)
U1461335-32-6Lead, bis(acetato-O)tetrahydroxytri-
U1461335-32-6Lead subacetate
U147108-31-62,5-Furandione
U147108-31-6Maleic anhydride
U148123-33-1Maleic hydrazide
U148123-33-13,6-Pyridazinedione, 1,2-dihydro-
U149109-77-3Malononitrile
U149109-77-3Propanedinitrile
U150148-82-3Melphalan
U150148-82-3L-Phenylalanine, 4-[bis(2-chloroethyl)amino]-
U1517439-97-6Mercury
U152126-98-7Methacrylonitrile (I,T)
U152126-98-72-Propenenitrile, 2-methyl- (I,T)
U15374-93-1Methanethiol (I,T)
U15374-93-1Thiomethanol (I,T)
U15467-56-1Methanol (I)
U15467-56-1Methyl alcohol (I)
U15591-80-51,2-Ethanediamine, N,N-dimethyl-N'-2-pyridinyl-N'-(2-thienylmethyl)-
U15591-80-5Methapyrilene
U15679-22-1Carbonochloridic acid, methyl ester (I,T)
U15679-22-1Methyl chlorocarbonate (I,T)
U15756-49-5Benz[j]aceanthrylene, 1,2-dihydro-3-methyl-
U15756-49-53-Methylcholanthrene
U158101-14-4Benzenamine, 4,4'-methylenebis[2-chloro-
U158101-14-44,4'-Methylenebis(2-chloroaniline)
U15978-93-32-Butanone (I,T)
U15978-93-3Methyl ethyl ketone (MEK) (I,T)
U1601338-23-42-Butanone, peroxide (R,T)
U1601338-23-4Methyl ethyl ketone peroxide (R,T)
U161108-10-1Methyl isobutyl ketone (I)
U161108-10-14-Methyl-2-pentanone (I)
U161108-10-1Pentanol, 4-methyl-
U16280-62-6Methyl methacrylate (I,T)
U16280-62-62-Propenoic acid, 2-methyl-, methyl ester (I,T)
U16370-25-7Guanidine, -methyl-N'-nitro-N-nitroso-
U16370-25-7MNNG
U16456-04-2Methylthiouracil
U16456-04-24(1H)-Pyrimidinone, 2,3-dihydro-6-methyl-2-thioxo-
U16591-20-3Naphthalene
U166130-15-41,4-Naphthalenedione
U166130-15-41,4-Naphthoquinone
U167134-32-71-Naphthalenamine
U167134-32-7alpha-Naphthylamine
U16891-59-82-Naphthalenamine
U16891-59-8beta-Naphthylamine
U16998-95-3Benzene, nitro-
U16998-95-3Nitrobenzene (I,T)
U170100-02-7p-Nitrophenol
U170100-02-7Phenol, 4-nitro-
U17179-46-92-Nitropropane (I,T)
U17179-46-9Propane, 2-nitro- (I,T)
U172924-16-31-Butanamine, N-butyl-N-nitroso-
U172924-16-3N-Nitrosodi-n-butylamine
U1731116-54-7Ethanol, 2,2'-(nitrosoimino)bis-
U1731116-54-7N-Nitrosodiethanolamine
U17455-18-5Ethanamine, -ethyl-N-nitroso-
U17455-18-5N-Nitrosodiethylamine
U176759-73-9N-Nitroso-N-ethylurea
U176759-73-9Urea, N-ethyl-N-nitroso-
U177684-93-5N-Nitroso-N-methylurea
U177684-93-5Urea, N-methyl-N-nitroso-
U178615-53-2Carbamic acid, methylnitroso-, ethyl ester
U178615-53-2N-Nitroso-N-methylurethane
U179100-75-4N-Nitrosopiperidine
U179100-75-4Piperidine, 1-nitroso-
U180930-55-2N-Nitrosopyrrolidine
U180930-55-2Pyrrolidine, 1-nitroso-
U18199-55-8Benzenamine, 2-methyl-5-nitro-
U18199-55-85-Nitro-o-toluidine
U182123-63-71,3,5-Trioxane, 2,4,6-trimethyl-
U182123-63-7Paraldehyde
U183608-93-5Benzene, pentachloro-
U183608-93-5Pentachlorobenzene
U18476-01-7Ethane, pentachloro-
U18476-01-7Pentachloroethane
U18582-68-8Benzene, pentachloronitro-
U18582-68-8Pentachloronitrobenzene (PCNB)
U186504-60-91-Methylbutadiene (I)
U186504-60-91,3-Pentadiene (I)
U18762-44-2Acetamide, -(4-ethoxyphenyl)-
U18762-44-2Phenacetin
U188108-95-2Phenol
U1891314-80-3Phosphorus sulfide (R)
U1891314-80-3Sulfur phosphide (R)
U19085-44-91,3-Isobenzofurandione
U19085-44-9Phthalic anhydride
U191109-06-82-Picoline
U191109-06-8Pyridine, 2-methyl-
U19223950-58-5Benzamide, 3,5-dichloro-N-(1,1-dimethyl-2-propynyl)-
U19223950-58-5Pronamide
U1931120-71-41,2-Oxathiolane, 2,2-dioxide
U1931120-71-41,3-Propane sultone
U194107-10-81-Propanamine (I,T)
U194107-10-8n-Propylamine (I,T)
U196110-86-1Pyridine
U197106-51-4p-Benzoquinone
U197106-51-42,5-Cyclohexadiene-1,4-dione
U20050-55-5Reserpine
U20050-55-5Yohimban-16-carboxylic acid, 11,17-dimethoxy-18-[(3,4,5-trimethoxybenzoyl)oxy]-, methyl ester,(3beta,16beta,17alpha,18beta,20alpha)-
U201108-46-31,3-Benzenediol
U201108-46-3Resorcinol
U20394-59-71,3-Benzodioxole, 5-(2-propenyl)-
U20394-59-7Safrole
U2047783-00-8Selenious acid
U2047783-00-8Selenium dioxide
U2057488-56-4Selenium sulfide
U2057488-56-4Selenium sulfide SeS2 (R,T)
U20618883-66-4Glucopyranose, 2-deoxy-2-(3-methyl-3-nitrosoureido)-, D-
U20618883-66-4D-Glucose, 2-deoxy-2-[ [(methylnitrosoamino)-carbonyl]amino]-
U20618883-66-4Streptozotocin
U20795-94-3Benzene, 1,2,4,5-tetrachloro-
U20795-94-31,2,4,5-Tetrachlorobenzene
U208630-20-6Ethane, 1,1,1,2-tetrachloro-
U208630-20-61,1,1,2-Tetrachloroethane
U20979-34-5Ethane, 1,1,2,2-tetrachloro-
U20979-34-51,1,2,2-Tetrachloroethane
U210127-18-4Ethene, tetrachloro-
U210127-18-4Tetrachloroethylene
U21156-23-5Carbon tetrachloride
U21156-23-5Methane, tetrachloro-
U213109-99-9Furan, tetrahydro-(I)
U213109-99-9Tetrahydrofuran (I)
U214563-68-8Acetic acid, thallium(1 + ) salt
U214563-68-8Thallium(I) acetate
U2156533-73-9Carbonic acid, dithallium(1 + ) salt
U2156533-73-9Thallium(I) carbonate
U2167791-12-0Thallium(I) chloride
U2167791-12-0Thallium chloride TlCl
U21710102-45-1Nitric acid, thallium(1 + ) salt
U21710102-45-1Thallium(I) nitrate
U21862-55-5Ethanethioamide
U21862-55-5Thioacetamide
U21962-56-6Thiourea
U220108-88-3Benzene, methyl-
U220108-88-3Toluene
U22125376-45-8Benzenediamine, ar-methyl-
U22125376-45-8Toluenediamine
U222636-21-5Benzenamine, 2-methyl-, hydrochloride
U222636-21-5o-Toluidine hydrochloride
U22326471-62-5Benzene, 1,3-diisocyanatomethyl- (R,T)
U22326471-62-5Toluene diisocyanate (R,T)
U22575-25-2Bromoform
U22575-25-2Methane, tribromo-
U22671-55-6Ethane, 1,1,1-trichloro-
U22671-55-6Methyl chloroform
U22671-55-61,1,1-Trichloroethane
U22779-00-5Ethane, 1,1,2-trichloro-
U22779-00-51,1,2-Trichloroethane
U22879-01-6Ethene, trichloro-
U22879-01-6Trichloroethylene
U23499-35-4Benzene, 1,3,5-trinitro-
U23499-35-41,3,5-Trinitrobenzene (R,T)
U235126-72-71-Propanol, 2,3-dibromo-, phosphate (3:1)
U235126-72-7Tris(2,3-dibromopropyl) phosphate
U23672-57-12,7-Naphthalenedisulfonic acid, 3,3'-[(3,3'-dimethyl[1,1'-biphenyl]-4,4'-diyl)bis(azo)bis[5-amino-4-hydroxy]-, tetrasodium salt
U23672-57-1Trypan blue
U23766-75-12,4-(1H,3H)-Pyrimidinedione, 5-[bis(2-chloroethyl)amino]-
U23766-75-1Uracil mustard
U23851-79-6Carbamic acid, ethyl ester
U23851-79-6Ethyl carbamate (urethane)
U2391330-20-7Benzene, dimethyl- (I,T)
U2391330-20-7Xylene (I)
U240194-75-7Acetic acid, (2,4-dichlorophenoxy)-, salts & esters
U240194-75-72,4-D, salts & esters
U2431888-71-7Hexachloropropene
U2431888-71-71-Propene, 1,1,2,3,3,3-hexachloro-
U244137-26-8Thioperoxydicarbonic diamide [(H2N)C(S)]2 S2, tetramethyl-
U244137-26-8Thiram
U246506-68-3Cyanogen bromide (CN)Br
U24772-43-5Benzene, 1,1'-(2,2,2-trichloroethylidene)bis[4- methoxy-
U24772-43-5Methoxychlor
U248181-81-22H-1-Benzopyran-2-one, 4-hydroxy-3-(3-oxo-1-phenyl-butyl)-, & salts, when present at concentrations of 0.3% or less
U248181-81-2Warfarin, & salts, when present at concentrations of 0.3% or less
U2491314-84-7Zinc phosphide Zn3 P2, when present at concentrations of 10% or less
U27117804-35-2Benomyl
U27117804-35-2Carbamic acid, [1-[(butylamino)carbonyl]-1H-benzimidazol-2-yl]-, methyl ester
U27822781-23-3Bendiocarb
U27822781-23-31,3-Benzodioxol-4-ol, 2,2-dimethyl-, methyl carbamate
U27963-25-2Carbaryl
U27963-25-21-Naphthalenol, methylcarbamate
U280101-27-9Barban
U280101-27-9Carbamic acid, (3-chlorophenyl)-, 4-chloro-2-butynyl ester
U32895-53-4Benzenamine, 2-methyl-
U32895-53-4o-Toluidine
U353106-49-0Benzenamine, 4-methyl-
U353106-49-0p-Toluidine
U359110-80-5Ethanol, 2-ethoxy-
U359110-80-5Ethylene glycol monoethyl ether
U36422961-82-6Bendiocarb phenol
U36422961-82-61,3-Benzodioxol-4-ol, 2,2-dimethyl-,
U3671563-38-87-Benzofuranol, 2,3-dihydro-2,2-dimethyl-
U3671563-38-8Carbofuran phenol
U37210605-21-7Carbamic acid, 1H-benzimidazol-2-yl, methyl ester
U37210605-21-7Carbendazim
U373122-42-9Carbamic acid, phenyl-, 1-methylethyl ester
U373122-42-9Propham
U38752888-80-9Carbamothioic acid, dipropyl-, S-(phenylmethyl) ester
U38752888-80-9Prosulfocarb
U3892303-17-5Carbamothioic acid, bis(1-methylethyl)-, S-(2,3,3-trichloro-2-propenyl) ester
U3892303-17-5Triallate
U39430558-43-1A2213
U39430558-43-1Ethanimidothioic acid, 2-(dimethylamino)-N-hydroxy-2-oxo-, methyl ester
U3955952-26-1Diethylene glycol, dicarbamate
U3955952-26-1Ethanol, 2,2'-oxybis-, dicarbamate
U404121-44-8Ethanamine, N,N-diethyl-
U404121-44-8Triethylamine
U40923564-05-8Carbamic acid, [1,2-phenylenebis (iminocarbonothioyl)]bis-, dimethyl ester
U40923564-05-8Thiophanate-methyl
U41059669-26-0Ethanimidothioic acid, N,N'-[thiobis[(methylimino)carbonyloxy] ]bis-, dimethyl ester
U41059669-26-0Thiodicarb
U411114-26-1Phenol, 2-(1-methylethoxy)-, methylcarbamate
U411114-26-1Propoxur
See F02793-76-5Acetic acid, (2,4,5-trichlorophenoxy)-
See F02787-86-5Pentachlorophenol
See F02787-86-5Phenol, pentachloro-
See F02758-90-2Phenol, 2,3,4,6-tetrachloro-
See F02795-95-4Phenol, 2,4,5-trichloro-
See F02788-06-2Phenol, 2,4,6-trichloro-
See F02793-72-1Propanoic acid, 2-(2,4,5-trichlorophenoxy)-
See F02793-72-1Silvex (2,4,5-TP)
See F02793-76-52,4,5-T
See F02758-90-22,3,4,6-Tetrachlorophenol
See F02795-95-42,4,5-Trichlorophenol
See F02788-06-22,4,6-Trichlorophenol

**For the convenience of the regulated community, the primary hazardous properties of these materials have been indicated by the letters T (Toxicity), R (Reactivity), I (Ignitability) and C (Corrosivity). For wastes on the P list, absence of a letter indicates that the compound only is listed for acute toxicity. For wastes on the U list, absence of a letter indicates that the compound is only listed for toxicity.]

1CAS Number given for parent compound only.

Characteristic Wastes

Key Resources

A hazardous waste characteristic is a property which, when present in a waste, indicates that the waste poses a sufficient threat to merit regulation as hazardous. EPA established four hazardous waste characteristics: ignitability, corrosivity, reactivity and toxicity.

Ignitability

Wastes that are hazardous due to the ignitability characteristic include liquids with flash points below 60 °C, non-liquids that cause fire through specific conditions, ignitable compressed gases and oxidizers. EPA assigned D001 as the waste code for ignitable hazardous wastes.

Explosive Hazardous Wastes

Read about these wastes and their treatment technologies.

Test methods for ignitability include the Pensky-Martens Closed-Cup Method for Determining Ignitability (SW-846 Test Method 1010A), the Setaflash Closed-Cup Method for Determining Ignitability (SW-846 Test Method 1020B) and the Ignitability of Solids (SW-846 Test Method 1030). Read more about the ignitability characteristic in:

Corrosivity

Final denial of the petition to revise the RCRA corrosivity characteristic

Wastes that are hazardous due to the corrosivity characteristic include aqueous wastes with a pH of less than or equal to 2, a pH greater than or equal to 12.5 or based on the liquids ability to corrode steel. EPA assigned D002 as the waste code for corrosive hazardous wastes.

The test method to determine corrosivity towards steel is Corrosivity Towards Steel (SW-846 Test Method 1110A). Read about the corrosivity characteristic in:

Reactivity

Wastes that are hazardous due to the reactivity characteristic may be unstable under normal conditions, may react with water, may give off toxic gases and may be capable of detonation or explosion under normal conditions or when heated. EPA assigned D003 as the waste code for reactive hazardous wastes.

There are no test methods for reactivity. Read more about this characteristic:

Toxicity

Wastes that are hazardous due to the toxicity characteristic are harmful when ingested or absorbed. Toxic wastes present a concern as they may be able to leach from waste and pollute groundwater. The toxicity of a waste is determined by the Toxicity Characteristic Leaching Procedure (SW-846 Test Method 1311). EPA assigned wastes codes D004 through D043 that correspond to a contaminant and its associated TCLP concentration.

Read about the toxicity characteristic and regulatory levels for the TCLP test in 40 CFR section 261.24.

Mixed Radiological and Hazardous Waste

Mixed wastes are hazardous wastes which also contain radioactive material. Mixed waste is regulated under the RCRA and the Atomic Energy Act. The hazardous component of the mixed waste is regulated by EPA under RCRA. The radiological component of the mixed waste is regulated by the Department of Energy (DOE) or the Nuclear Regulatory Commission (NRC). The NRC typically regulates waste from commercial and non-DOE facilities while the DOE regulates waste from DOE facilities.

EPA’s Mixed Waste Rule provides increased flexibility to generators and facilities that manage low-level mixed waste and naturally occurring and/or accelerator-produced radioactive material containing hazardous waste by exempting these wastes from RCRA storage and treatment requirements. The exemption is conditional upon the waste is generated under a single NRC license, of which the waste meets the specified conditions and that the waste is stored and treated in a tank or container. Generators may store these wastes for as long as they are permitted to do so under their NRC or NRC agreement state license.

More information about the EPA Mixed Waste Rule can be found in the following final rule, final rule fact sheet and proposed rules:

Additional supporting documents can be found on regulations.gov in the docket for this rule.

Additional Resources

Hazardous Waste

Contact Us About Hazardous Waste
Contact Us About Hazardous Waste to ask a question, provide feedback, or report a problem.
Last updated on March 20, 2026