TSCA restricted substances: Information on substances restricted in Q1 2021

On January 6, 2021, the U.S. Environmental Protection Agency (EPA) published final rules under Toxic Substances Control Act (TSCA) Section 6(h) to restrict the importation and use of five persistent, bioaccumulative, and toxic (PBT) chemicals. The final rules specified prompt in-force dates in many cases, and the restricted chemicals listed are widely used in a number of industries.

These chemicals include:

  • PIP (3:1) (phenol, isopropylated phosphate (3:1), CAS 68937-41-7), a phosphate-ester flame retardant, anti-wear additive, and plasticizer.
  • DecaBDE (decabromodiphenyl ether, CAS 1163-19-5), a brominated flame retardant.
  • 2,4,6 TTBP (2,4,6-tris(tert-butyl)phenol, CAS 732-26-3), a lubricant & fuel additive.
  • HCBD (hexachlorobutadiene, CAS 87-68-3), a chlorinated hydraulic, heat transfer fluid, or transformer fluid.
  • PCTP (pentachlorothiophenol, CAS 133-49-3), a chlorinated plasticizer.

Two of these chemicals are already included on substance lists routinely surveyed for other well-known regulations: HCBD is on the California Proposition 65 list, and DecaBDE is on the EU REACH SVHC and Annex XVII lists. However, the remaining three chemicals (PIP (3:1), 2,4,6 TTBP, and PCTP) are not listed under California Proposition 65, REACH SVHC, REACH Annex XVII, or EU RoHS.  

For more information, see "TSCA restricted substances: Changes in January 2021", "TSCA 2021 chemical restrictions and PIP (3:1): Where to start", and other TSCA help center articles.


Article is current as of 2021-03-12.

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