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TSCA Activity Tracker (2025–26)

Posted on 8/20/2020 by Lion Technology Inc.

2025—26 TSCA Activity Tracker

Use the orange tabs below to explore updates about chemical prohibitions/bans, restrictions, and risk evaluations mandated by the Toxic Substances Control Act (TSCA).
 

Latest on TSCA Risk Evaluations and New Regulations

Recent updates from US EPA affecting chemical risk management regulations, evaluation of chemical risks, and/or priortiziation of chemicals for evaluation as mandated by the Toxic Substances Control Act (TSCA), as amended. 

Latest 2025 TSCA Chemical Risk Evaluation Updates

[See Past Updates]

What Are TSCA Chemical Risk Evaluations?

The Toxic Substance Control Act (TSCA), as amended, directs US EPA to evaluate the risks of chemicals on the TSCA Inventory and address any “unreasonable risks” with regulations to restrict manufacturing, distribution, and/or use.

Lion tracks the risk evaluation and rulemaking process here—from prioritization of a chemical through publication of risk management standards under TSCA Section 6, when applicable. This page also highlights key dates for industry stakeholders who wish to participate in the chemical risk evaluation and rulemaking process by submitting comments, attending public meetings, etc.

Use the orange tabs above to explore the latest TSCA chemical risk management rules, track risk evaluations as they are drafted and finalized, and look ahead at which chemicals are up next for evaluation.
 

Past Updates


Final Rules

When a risk evaluation shows a that chemical poses an “unreasonable risk” to human health or the environment, EPA must act to address the risk(s) with regulations for manufacturing, distribution, and/or use of the substance.

Chemical name Effective Date See 40 CFR 751... Link to Final Rule
Trichloroethylene (TCE) 03/21/25 (*)(†) Subpart D (751.301—.325) Update (9/17/25)
Carbon Tetrachloride (CTC) 01/17/25 (**) Subpart H (751.701—.713) Update (9/17/25)
Perchloroethylene (PCE) 01/17/25 (***) Subpart G (751.601—.617) Update (07/30/25)
Methylene Chloride (MCL) 07/08/24 Subpart B (751.101—.117) Final Rule (05/08/24)
Asbestos (Chrysotile) 05/28/24 Subpart F (751.501—.515) Final Rule (03/28/24)
 

* Trichloroethylene (TCE). US EPA has again postponed—until November 17, 2025—the deadline for compliance with requirements for monitoring and controlling exposure to TCE under TSCA §6(a). The 60-day postponement applies to uses of TCE that are exempt from the December 2024 Final Rule to prohibit and/or phase-out all activity involving the chemical.

† Trichloroethylene (TCE). US EPA has extended the compliance deadlines for two conditions of use for TCE, including use as a processing aid in the manufacture of nuclear fuel.

** Carbon Tetrachloride (CTC). EPA announced on September 12, 2025 that the 2024 Final Rule for carbon tetrachloride or "carbon tet" will be reconsidered in response to legal challenges.

*** Perchloroethylene (PCE). EPA is preparing to reconsider the December 2024 Final Rule to prohibit or restrict uses of PCE. On July 30, 2025, the Agency requested comments from stakeholders and the public to inform that effort.


Final Rules for PBT Chemicals

Section 6(h) of TSCA directs US EPA to evaluate and, if necessary, address the risks posed by specific persistent, bioaccumulative, and toxic chemical substances or "PBTs".

Chemical name Latest Update See 40 CFR 751...
Decabromodiphenyl ether (DecaBDE) Final Rule—Revisions (11/19/24) Subpart E (751.405)
Phenol, Isopropylated Phosphate 3:1 (PIP 3:1) Final Rule—Revisions (11/19/24) Subpart E (751.407)
Pentachlorothiophenol (PCTP) Final Rule (01/06/21) Subpart E (751.411)
Hexachlorobutadiene (HCBD) Final Rule (01/06/21) Subpart E (751.413)
2,4,6-tris(tert-butyl)phenol (2,4,6- TTBP) Final Rule (01/06/21) Subpart E (751.409)

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Proposed Rules

EPA follows strict procedure to impose new TSCA restrictions. The process involves talking with stakeholders, proposing a rule, taking comments, and having the rule approved by the Office of Management and Budget (OMB).

Chemical name Comments End Rule Details Link to Proposed Rule
C.I. Pigment Violet 29 (PV-29) 04/29/25 Details Comments Extended
1-bromopropane (1-BP) 09/23/24 Details Proposed Rule
n-Methylpyrrolidone (NMP) 07/29/24 Details Proposed Rule
 

Proposed Rules for PBT Chemicals

Section 6(h) of TSCA directs US EPA to evaluate and, if necessary, address the risks posed by specific persistent, bioaccumulative, and toxic chemical substances or "PBTs".

Chemical name Comments End Link to Proposed Rule
Phenol, Isopropylated Phosphate 3:1 (PIP 3:1) 01/08/24 Final Rule published 11/19/24
Decabromodiphenyl ether (DecaBDE) 01/08/24 Final Rule published 11/19/24

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Final Risk Evaluations

After reviewing and addressing public comments, EPA announces the result of each risk evaluation along with a final determination concerning “unreasonable risk.” Completed evaluations will be listed below until EPA takes further action.

Chemical name Announced Unreasonable Risk? Link to Notice
1,1-dichloroethane (1,1-DCA) 06/23/25 Yes (Health) Final Risk Evaluation
Di-isononyl phthalate (DINP) * 01/14/25 Yes (Health) Final Risk Evaluation
Formaldehyde 01/03/25 Yes (Health) Final Risk Evaluation
Asbestos (Legacy Uses/Disposals) 11/27/24 Yes (Health) Final Risk Evaluation
1,4-dioxane 11/14/24 Yes (Health) Final Risk Evaluation
Tris(2-chloroethyl) phosphate (TCEP) 09/26/24 Yes (Health, Environment) Final Risk Evaluation
HBCD 1 06/29/22 Yes (Health, Environment) Rev. Risk Evaluation
 

* Manufacturer requested risk evaluation

1 a.k.a. Cyclic Aliphatic Bromide Cluster

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Draft Risk Evaluations

Before acting on the results of a risk evaluation, EPA must share the evaluation in draft form. At this stage, stakeholders and the public can review and comment on EPA’s findings before a final determination is made.

Chemical name Comments End Unreasonable Risk? Link to Notice
Octamethylcyclotetrasiloxane (D4) * 11/17/25 Yes (Health, Environment) Notice
Di-isobutyl phthalate (DIBP) 10/06/25 Yes (Health, Environment) Notice
Butyl benzyl phthalate (BBP) 10/06/25 Yes (Health, Environment Notice
Dibutyl phthalate (DBP) 08/04/25 Yes (Health, Environment) Notice
Diethylhexyl phthalate (DEHP) 08/04/25 Yes (Health, Environment) Notice
Dicyclohexyl phthalate (DCHP) 05/09/25 Yes (Health) Comments Extended
1,3-butadiene 03/25/25 Yes (Health) Supplement/Extension
Di-iosdecyl phthalate (DIDP) * 07/19/24 Yes (Health) Notice
1,2-dichloroethane (ethylene dichloride) 09/02/24 TBD Draft Hazard Assessment
 

* Manufacturer requested risk evaluation

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High Priority Chemicals

To identify chemicals as “high priority” for risk evaluation, EPA draws mostly from a TSCA Work Plan completed in 2014. EPA also considers public comments, available scientific data, and statutory requirement/limits.

Chemical name Comments End Designated Link
Vinyl Chloride 04/02/25 12/18/24 Update
4-tert-Ocylphenol 03/18/25 12/18/24 (Proposed) Notice
Benzene 03/18/25 12/18/24 (Proposed) Notice
Ethylbenzene 03/18/25 12/18/24 (Proposed) Notice
Naphthalene 03/18/25 12/18/24 (Proposed) Notice
Styrene 03/18/25 12/18/24 (Proposed) Notice
Acetaldehyde 10/23/24 12/18/24 Notice
Acrylonitrile 10/23/24 12/18/24 Notice
Benzenamine 10/23/24 12/18/24 Notice
MBOCA 3 10/23/24 12/18/24 Notice
1,3-butadiene - 12/20/19 Final Scope
Dibutyl phthalate (DBP)  - 12/20/19 Final Scope
o-Dichlorobenzene - 12/20/19 Final Scope
p-Dichlorobenzene - 12/20/19 Final Scope
trans-1,2-Dichloroethylene - 12/20/19 Final Scope
1,2-Dichloropropane - 12/20/19 Final Scope
Di-ethylhexyl phthalate (DEHP) - 12/20/19 Final Scope
Ethylene dibromide - 12/20/19 Final Scope
HHCB 2 - 12/20/19 Final Scope
TBBPA 1 - 12/20/19 Final Scope
Phosphoric acid, triphenyl ester (TPP) - 12/20/19 Final Scope
Phthalic anhydride - 12/20/19 Final Scope
1,1,2-Trichloroethane - 12/20/19 Final Scope

* Manufacturer-requested Risk Evaluation
1 4,4'-(1-Methylethylidene)bis[2, 6-dibromophenol] [TBBPA]
2 1,3,4,6,7,8-Hexahydro-4,6,6,7,8,8-hexamethylcyclopenta [g]-2-benzopyran [HHCB]
3 '4-4'-methylene bis(2-chloroaniline) [MBOCA]

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