Chemical Substances Undergoing Prioritization: High-Priority
On December 20, 2019, EPA finalized the designation of 20 high-priority chemicals. It is important to note that being designated as a high-priority chemical does not mean that a chemical is high risk. These chemicals will move through the process required by TSCA to evaluate any unreasonable risks they may present to human health or the environment.
- Read the Federal Register notice.
- Visit Chemical Substances Undergoing Prioritization.
- Visit Chemical Substances Undergoing Prioritization: Low-Priority.
| High-Priority Candidates | ||||
| Chemical Name | CAS | Docket Number | Status* | Agency Contact |
|---|---|---|---|---|
| p-Dichlorobenzene | 106-46-7 | EPA-HQ-OPPT-2018-0446 | High | Eileen Sheehan Email: Sheehan.eileen@epa.gov Phone: 415-972-3287 |
| 1,2-Dichloroethane | 107-06-2 | EPA-HQ-OPPT-2018-0427 | High | Tyler Lloyd Email: Lloyd.tyler@epa.gov Phone: 202-564-4016 |
| trans-1,2- Dichloroethylene | 156-60-5 | EPA-HQ-OPPT-2018-0465 | High | Toni Krasnic Email: Krasnic.toni@epa.gov Phone: 202-564-0984 |
| o-Dichlorobenzene | 95-50-1 | EPA-HQ-OPPT-2018-0444 | High | Eileen Sheehan Email: Sheehan.eileen@epa.gov Phone: 415-972-3287 |
| 1,1,2-Trichloroethane | 79-00-5 | EPA-HQ-OPPT-2018-0421 | High | Tyler Lloyd Email: Lloyd.tyler@epa.gov Phone: 202-564-4016 |
| 1,2-Dichloropropane | 78-87-5 | EPA-HQ-OPPT-2018-0428 | High | Clara Hull Email: Hull.clara@epa.gov Phone: 202-564-3954 |
| 1,1-Dichloroethane | 75-34-3 | EPA-HQ-OPPT-2018-0426 | High | Clara Hull Email: Hull.clara@epa.gov Phone: 202-564-3954 |
| Dibutyl phthalate (DBP) (1,2-Benzene- dicarboxylic acid, 1,2- dibutyl ester) | 84-74-2 | EPA-HQ-OPPT-2018-0503 | High | Peter Gimlin Email: Gimlin.peter@epa.gov Phone: 202-566-0515 |
| Butyl benzyl phthalate (BBP) - 1,2-Benzene- dicarboxylic acid, 1- butyl 2(phenylmethyl) ester | 85-68-7 | EPA-HQ-OPPT-2018-0501 | High | Bethany Masten Email: Masten.bethany@epa.gov Phone: 202-564-8803 |
| Di-ethylhexyl phthalate (DEHP) - (1,2-Benzene- dicarboxylic acid, 1,2- bis(2-ethylhexyl) ester) | 117-81-7 | EPA-HQ-OPPT-2018-0433 | High | Lea Carmichael Email: Carmichael.lea@epa.gov Phone: 202-564-4689 |
| Di-isobutyl phthalate (DIBP) - (1,2-Benzene- dicarboxylic acid, 1,2- bis-(2methylpropyl) ester) | 84-69-5 | EPA-HQ-OPPT-2018-0434 | High | Jordan Garbin Email: Garbin.jordan@epa.gov Phone: 202-564-4156 |
| Dicyclohexyl phthalate | 84-61-7 | EPA-HQ-OPPT-2018-0504 | High | Claire Brisse Email: Brisse.claire@epa.gov Phone: 202-564-9004 |
| 4,4'-(1-Methylethylidene)bis[2, 6-dibromophenol] (TBBPA) | 79-94-7 | EPA-HQ-OPPT-2018-0462 | High | Hannah Braun Email: Braun.hannah@epa.gov Phone: 202-564-5614 |
| Tris(2-chloroethyl) phosphate (TCEP) | 115-96-8 | EPA-HQ-OPPT-2018-0476 | High | Claudia Menasche Email: Menasche.claudia@epa.gov Phone: 202-564-3391 |
| Phosphoric acid, triphenyl ester (TPP) | 115-86-6 | EPA-HQ-OPPT-2018-0458 | High | Sue Slotnick Email: Slotnick.sue@epa.gov Phone: 202-566-1973 |
| Ethylene dibromide | 106-93-4 | EPA-HQ-OPPT-2018-0488 | High | Meredith Comnes Email: Comnes.meredith@epa.gov Phone: 202-564-3193 |
| 1,3-Butadiene | 106-99-0 | EPA-HQ-OPPT-2018-0451 | High | Jeff Taylor Email: Taylor.jeffrey@epa.gov Phone: 202-564-8828 |
| 1,3,4,6,7,8-Hexahydro-4,6,6,7,8,8-hexamethylcyclopenta [g]-2-benzopyran (HHCB) | 1222-05-5 | EPA-HQ-OPPT-2018-0430 | High | Ana Corado Email: Corado.ana@epa.gov Phone: 202-564-0140 |
| Formaldehyde | 50-00-0 | EPA-HQ-OPPT-2018-0438 | High | Todd Coleman Email: Coleman.todd@epa.gov Phone: 202-564-1208 |
| Phthalic anhydride | 85-44-9 | EPA-HQ-OPPT-2018-0459 | High | Victoria Ellenbogen Email: Ellenbogen.victoria@epa.gov Phone: 202-564-2053 |
*Status is listed as either:
- Initiated – The first step of the prioritization process, and the chemical is currently undergoing a screening level review of reasonably available information to inform its priority designation;
- Proposed – The second step of the prioritization process, when EPA proposes a chemical’s designation as either high- or low-priority for risk evaluation; or
- High/Low - The final step of the prioritization process. This chemical has been designated as high- or low-priority for risk evaluation.