US TSCA Compliance Requirements
TSCA is the US federal law governing chemical substances. Its Section 6(h) rules restrict five persistent, bioaccumulative and toxic (PBT) chemicals, with one deadline landing about a month after this page was last reviewed.
Last reviewed September 27, 2026
PBT chemicals under TSCA: PIP (3:1) and 40 CFR 751
TSCA (15 U.S.C. § 2601 et seq.) is administered by EPA’s Office of Pollution Prevention and Toxics.
Section 6(h) PBT rules, finalized January 2021 and amended November 2024, restrict five chemicals: decabromodiphenyl ether (decaBDE), phenol isopropylated phosphate (3:1) (PIP (3:1)), 2,4,6-tris(tert-butyl)phenol (2,4,6-TTBP), hexachlorobutadiene (HCBD) and pentachlorothiophenol (PCTP), codified at 40 CFR part 751, subpart E.
PIP (3:1) has the most detailed, staggered prohibition schedule of the five, running from 2021 through 2039.
TSCA Section 8(a)(7)'s separate PFAS reporting rule is covered on the multi-state PFAS reporting page, since it maps to PFASTracker rather than MatCheck.
Obligations
- Persons who manufacture (including import), process, or distribute in commerce the five PBT chemicals must comply with the restrictions in 40 CFR part 751, subpart E.
- 40 CFR § 751.407, specific to PIP (3:1), reaches "all persons" — not only manufacturers — for its processing, distribution and article-import prohibitions.
Deadlines
- March 8, 2021General prohibition on processing/distribution of PIP (3:1) and PIP (3:1)-containing products or articles takes effect (with a 0.1% de minimis carve-out for non-intentionally-added PIP (3:1)). eCFR — 40 CFR § 751.407(a) — as of 2026-09-27
- January 1, 2022Prohibition on PIP (3:1) in photographic printing articles takes effect. eCFR — 40 CFR § 751.407(a) — as of 2026-09-27
- October 31, 2024All persons are prohibited from processing/distributing PIP (3:1) for use in articles, and from processing PIP (3:1)-containing articles. eCFR — 40 CFR § 751.407(a) — as of 2026-09-27
- January 6, 2025Prohibition on PIP (3:1) in adhesives and sealants takes effect (per the November 19, 2024 amendment to the rule). Federal Register — document 2024-25758 — as of 2026-09-27
- October 31, 2026All persons are prohibited from distribution in commerce of PIP (3:1)-containing articles — the next upcoming PIP (3:1) deadline as of this review. eCFR — 40 CFR § 751.407(a)(2) — as of 2026-09-27
- November 21, 2039Prohibition on PIP (3:1) in lubricants/greases and in parts for new motor vehicles (including heavy machinery) takes effect. eCFR — 40 CFR § 751.407(a)(2) — as of 2026-09-27
How Rumzer Helps
- MatCheck includes US TSCA among the 20+ global regulations covered in every plan, so PBT-chemical checks run alongside REACH, RoHS and the rest of your material compliance work.
Frequently asked questions
What chemicals are regulated under the TSCA PBT rule?
Five: decabromodiphenyl ether (decaBDE), phenol isopropylated phosphate (3:1) (PIP (3:1)), 2,4,6-tris(tert-butyl)phenol (2,4,6-TTBP), hexachlorobutadiene (HCBD) and pentachlorothiophenol (PCTP), restricted under 40 CFR part 751, subpart E.
What is the next TSCA PIP (3:1) deadline?
As of this review, the next deadline is October 31, 2026, when all persons are prohibited from distributing PIP (3:1)-containing articles in commerce.
Sources
- EPA — Summary of the Toxic Substances Control Act — fetched 2026-09-27
- eCFR — Title 40, Chapter I, Subchapter R — fetched 2026-09-27
- EPA — PBT chemicals under TSCA — fetched 2026-09-27
- Federal Register — document 2024-25758 — fetched 2026-09-27
See also: the PFAS reporting explainer · the compliance glossary
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