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).

Home Prohibitions & Rules Risk Evaluations Next Up: High Priority Chemicals

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

EPA announced that the final Risk Evaluation for 1,1-dichloroethane is available
EPA delayed the effective date for specific provisions in the TCE Final Rule until August 19, 2025
EPA will accept comments on draft risk evaluations for two phthalates, DBP and DEHP, until August 4, 2025.
EPA extended the deadline for chemical manufacturers to submit health and safety data for 16 substances until May 22, 2026

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

EPA extended the comment period for the draft risk evaluation of DCHP until May 9.
EPA re-opened the comment period for the proposed rule to add worker protections for PV29 in powder form until April 29
EPA extended the comment period for the draft scope of a risk evaluation for vinyl chloride until April 2
EPA extended the comment period for the draft risk evaluation of 1,3-butadiene until March 5
EPA delayed the effective date of the Final Rule for the chemical trichloroethylene (TCE) until March 21
EPA issued a supplement to the Draft Risk Evaluation for 1,3-butadiene and is extending the comment period until March 25

Home Prohibitions & Rules Risk Evaluations Next Up: High Priority Chemicals
Final Rules Proposed Rules

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 (06/23/25)
Carbon Tetrachloride (CTC)	01/17/25	Subpart H (751.701—.713)	Final Rule (12/18/24)
Perchloroethylene (PCE)	01/17/25	Subpart G (751.601—.617)	Final Rule (12/18/24)
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 postponed—until August 19, 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.

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)

Home Prohibitions & Rules Risk Evaluations Next Up: High Priority Chemicals
Final Rules Proposed Rules

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

Home Prohibitions & Rules Risk Evaluations Next Up: High Priority Chemicals
Final Evaluations Draft Evaluations

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
Cyclic Aliphatic Bromide Cluster (HBCD)	06/29/22	Yes (Health, Environment)	Rev. Risk Evaluation

* Manufacturer requested risk evaluation

Home Prohibitions & Rules Risk Evaluations Next Up: High Priority Chemicals
Final Evaluations Draft Evaluations

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
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

Home Prohibitions & Rules Risk Evaluations Next Up: High Priority Chemicals
High Priority Chemicals

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
Octamethylcyclotetrasiloxane (D4) *	-	10/00/20 (Req. Granted)	Final Scope
1,3-butadiene	-	12/20/19	Final Scope
Butyl benzyl phthalate (BBP)	-	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
Di-isobutyl phthalate (DIBP)	-	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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