Substitutes for ODS in Aerosol Solvents and Propellants

Substitutes are reviewed on the basis of ozone depletion potential, global warming potential, toxicity, flammability, and exposure potential. Lists of acceptable and unacceptable substitutes are updated several times each year. A chronological list of SNAP updates is also available.

Note: SNAP Notices and Final Rules published in the Federal Register take precedence over all information on the web site.

Substitutes for Aerosol Solvents

Substitute	ODS Being Replaced	Decision	Conditions or Restrictions	Comments
HCFC-225ca/cb	CFC-113, Methyl Chloroform	Acceptable	None	EPA recommends observing the manufacturer’s recommended exposure guidelines of 50 ppm for the -ca isomer, 400 ppm for the -cb isomer, and 100 ppm for the commercial mixture of HCFC-225ca/cb. EPA encourages users to consider other alternatives that do not have an ozone depletion potential.
HFC-4310mee	CFC-113, Methyl Chloroform, HCFC-141b	Acceptable subject to use conditions	Subject to a 200 ppm time-weighted average workplace exposure standard and a 400ppm workplace exposure ceiling.	None
Monochlorotoluene / benzotrifluorides	CFC-113, CFC-11, Methyl Chloroform, HCFC-141b	Acceptable subject to use conditions	Subject to a 50 ppm workplace standard for monochloro-toluenes and a 100 ppm acceptable exposure limit (AEL) for benzotrifluoride.	None
Chlorobromomethane	CFC-113, Methyl Chloroform, HCFC-141b	Unacceptable	N/A	Other alternatives exist with zero or much lower ODP.
Perfluorocarbons	CFC-113, Methyl Chloroform, HCFC-141b	Acceptable subject to narrowed use limits	Acceptable only where reasonable efforts have been made to ascertain that other alternatives are not technically feasible due to performance or safety requirements.	PFCs have extremely long atmospheric lifetimes and high GWPs. This decision reflects these concerns and is patterned after the SNAP decision on PFCs in the solvent cleaning sector.
Perfluoropolyethers	CFC-113, Methyl Chloroform, HCFC-141b	Acceptable subject to narrowed use limits	Acceptable only where reasonable efforts have been made to ascertain that other alternatives are not technically feasible due to performance or safety requirements.	PFPEs have extremely long atmospheric lifetimes and high GWPs. This decision reflects these concerns and is patterned after the SNAP decision on PFCs in the solvent cleaning sector.
HFE-7200 (C5F9OCH3)	CFC-113, Methyl Chloroform	Acceptable	None	The Agency expects that any exposures will not exceed any acceptable exposure limits set by any voluntary consensus standards organization, including the American Conference of Governmental Industrial Hygienists' (ACGIH) threshold limit values (TLVs) or the American Industrial Hygiene Association's (AIHA) workplace environmental exposure limits (WEELs).
C5-C20 Petroleum hydrocarbons	CFC-113, Methyl Chloroform, CFC-11, HCFC-141b	Acceptable	None	Petroleum hydrocarbons are flammable. Use with the necessary precautions. Pesticide aerosols must adhere to FIFRA standards.
Chlorinated solvents (trichloroethylene, perchloroethylene, methylene chloride)	CFC-113, Methyl Chloroform, CFC-11, HCFC-141b	Acceptable	None	Extensive regulations under other statutes govern use of these chemicals, including VOC standards, workplace standards, waste management standards, and pesticide formulation and handling standards. Should be used only for products where nonflammability is a critical feature.
Oxygenated organic solvents (esters, ethers, alcohols, ketones)	CFC-113, Methyl Chloroform, CFC-11, HCFC-141b	Acceptable	None	These substitutes are flammable. Use with the necessary precautions.
Terpenes	CFC-113, Methyl Chloroform, CFC-11, HCFC-141b	Acceptable	None	These substitutes are flammable. Use with the necessary precautions.
Water-based formulations	CFC-113, Methyl Chloroform, CFC-11, HCFC-141b	Acceptable	None	None
Trans-1,2-dichloroethylene	CFC-113, Methyl Chloroform, CFC-11, HCFC-141b	Acceptable	None	The OSHA set exposure limit is 200 ppm.
Hydrofluoroether (HFE) 7100: C4F9OCH3 (methoxynona-fluorobutane, iso and normal)	CFC-113, Methyl Chloroform, CFC-11, HCFC-141b	Acceptable	None	None
HCFC-141b and its blends	CFC-113, Methyl Chloroform, CFC-11	Acceptable	None	All aerosol solvent uses of HCFC-141b, either by itself or blended with other compounds, were prohibited as of January 1, 1994 under Section 610(d) of the Clean Air Act. Limited exemptions exist. These are described in the section on aerosol substitutes in 59 FR 13044.
HFC-365mfc	CFC-113, Methyl Chloroform, HCFC-141b	Acceptable	None	None
HFC-245fa	CFC-113, HCFC-141b	Acceptable	None	EPA expects that the workplace environmental exposure will not exceed the Workplace Environmental Exposure Limit of 300 ppm and that users will observe the manufacturer’s recommendations in MSDSs.
HFE-7000 (heptafluoropropyl methyl ether)	CFC-113, Methyl Chloroform	Acceptable	None	EPA expects that the workplace environmental exposure will not exceed the workplace environmental exposure limit of 75 ppm and that users will observe the manufacturer's recommendations in MSDSs.
The Mini-Max Cleaner®	CFC-113, Methyl Chloroform	Acceptable	None	None

Substitutes for Aerosol Propellants

Substitute	ODS Being Replaced	Decision	Conditions or Restrictions	Comments
C3-C6 Saturated light hydro-carbons (e.g., propane, n-butane, isobutane)	HCFC-22, CFC-11, HCFC-142b	Acceptable	None	Hydrocarbons are flammable. Use with the necessary precautions.
Dimethyl Ether	HCFC-22, CFC-11, HCFC-142b	Acceptable	None	Hydrocarbons are flammable. Use with the necessary precautions. Blends of DME with HCFCs are subject to section 610 restrictions.
HFC-152a, HFC-134a, HFC-125	HCFC-22, CFC-11, HCFC-142b	Acceptable	None	HFC-152a, HFC-134a, and HFC-125 are potential greenhouse gases.
HFC-227ea	HCFC-22, CFC-11, CFC-12, CFC-114, HCFC-142b	Acceptable	None	Despite the relatively high global warming potential of this compound, the agency has listed this substitute as acceptable since it meets a specialized application in MDIs where other substitutes do not provide acceptable performance.
Alternative processes (pumps, mech-anical pressure dispensers, non-spray dispensers)	HCFC-22, CFC-11, HCFC-142b	Acceptable	None	None
Compressed Gases (carbon dioxide, air, nitrogen, nitrous oxide)	HCFC-22, CFC-11, HCFC-142b	Acceptable	None	None
SF6	HCFC-22, CFC-11, CFC-12, HCFC-142b	Unacceptable	N/A	SF6 has the highest GWP of all industrial gases, and other compressed gases meet user needs equally well.
HCFC-22, HCFC-142b	CFC-11	Acceptable	None	All aerosol propellant uses of HCFC-22 and HCFC-142b are already prohibited as of January 1, 1994, under Section 610(d) of the Clean Air Act. Only one exemption exists. It is described in the section on aerosol substitutes in 59 FR 13044.

Substitutes for ODS in Aerosol Solvents and Propellants

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