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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. 

2025 TSCA Chemical Risk Evaluation 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.

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) 03/21/2025 (New) Subpart D (751.301—.325) Extended (01/28/2025)
Carbon Tetrachloride (CTC) 01/17/2025 Subpart H (751.701—.713) Final Rule (12/18/2024)
Perchloroethylene (PCE) 01/17/2025 Subpart G (751.601—.617) Final Rule (12/18/2024)
Methylene Chloride (MCL) 07/08/2024 Subpart B (751.101—.117) Final Rule (05/08/2024)
Asbestos (Chrysotile) 05/28/2024 Subpart F (751.501—.515) Final Rule (03/28/2024)
 

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 (11/19/2024) Subpart E (751.405)
Phenol, Isopropylated Phosphate 3:1 (PIP 3:1) Final Rule—Revisions (11/19/2024) Subpart E (751.407)
Pentachlorothiophenol (PCTP) Final Rule (01/06/2021) Subpart E (751.411)
Hexachlorobutadiene (HCBD) Final Rule (01/06/2021) Subpart E (751.413)
2,4,6-tris(tert-butyl)phenol (2,4,6- TTBP) Final Rule (01/06/2021) 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) 02/28/2025 Details Proposed Rule
1-bromopropane (1-BP) 09/23/2024 Details Proposed Rule
n-Methylpyrrolidone (NMP) 07/29/2024 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) 01/08/2024 Final Rule published 11/19/2024
Decabromodiphenyl ether (DecaBDE) 01/08/2024 Final Rule published 11/19/2024

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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
(New) Di-isononyl Phthalate (DINP) * 01/14/2025 Yes (Health) Final Risk Evaluation
(New) Formaldehyde 01/03/2025 Yes (Health) Final Risk Evaluation
Asbestos (Legacy Uses/Disposals) 11/27/2024 Yes (Health) Final Risk Evaluation
1,4-dioxane 11/14/2024 Yes (Health) Final Risk Evaluation
Tris(2-chloroethyl) phosphate (TCEP) 09/26/2024 Yes (Health, Environment) Final Risk Evaluation
Cyclic Aliphatic Bromide Cluster (HBCD) 06/29/2022 Yes (Health, Environment) Final Risk Evaluation (Rev.)

* Manufacturer requested risk evaluation

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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
Dicyclohexyl phthalate (DCHP) 03/10/2025 Yes (Health) Draft Risk Evaluation
1,3-butadiene 03/05/2025 (New) Yes (Health) Comments Extended
1,1-dichloroethane (1,1-DCA) 09/02/2024 Yes (Health) Draft Risk Evaluation
Di-iosdecyl Phthalate (DIDP)* 07/19/2024 Yes (Health) Draft Risk Evaluation
1,2-dichloroethane (ethylene dichloride) 09/02/2024 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 Comment Period Ends High Priority Designation Link to Notice
Acetaldehyde 10/23/2024 12/18/2024 (Final) Notice
Acrylonitrile 10/23/2024 12/18/2024 (Final) Notice
Benzenamine 10/23/2024 12/18/2024 (Final) Notice
MBOCA 3 10/23/2024 12/18/2024 (Final) Notice
Vinyl Chloride 10/23/2024 12/18/2024 (Final) Notice
4-tert-Ocylphenol 03/18/2025 12/18/2024 (Proposed) Notice
Benzene 03/18/2025 12/18/2024 (Proposed) Notice
Ethylbenzene 03/18/2025 12/18/2024 (Proposed) Notice
Naphthalene 03/18/2025 12/18/2024 (Proposed) Notice
Styrene 03/18/2025 12/18/2024 (Proposed) Notice
Octamethylcyclotetrasiloxane (D4) * - 10/00/2020 (Req. Granted) Final Scope
1,3-butadiene - 12/20/2019 Final Scope
Butyl benzyl phthalate (BBP) - 12/20/2019 Final Scope
Dibutyl phthalate (DBP)  - 12/20/2019 Final Scope
o-Dichlorobenzene - 12/20/2019 Final Scope
p-Dichlorobenzene - 12/20/2019 Final Scope
trans-1,2-Dichloroethylene - 12/20/2019 Final Scope
1,2-Dichloropropane - 12/20/2019 Final Scope
Di-ethylhexyl phthalate (DEHP) - 12/20/2019 Final Scope
Di-isobutyl phthalate (DIBP) - 12/20/2019 Final Scope
Ethylene dibromide - 12/20/2019 Final Scope
HHCB 2 - 12/20/2019 Final Scope
TBBPA 1 - 12/20/2019 Final Scope
Phosphoric acid, triphenyl ester (TPP) - 12/20/2019 Final Scope
Phthalic anhydride - 12/20/2019 Final Scope
1,1,2-Trichloroethane - 12/20/2019 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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