TSCA Reform

TSCA PBT: Restriction of 5 Substances in Products

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What Action is the EPA Taking?

US Environmental Protection Agency - Restrictions in products

The Frank R. Lautenberg Chemical Safety for the 21st Century Act has initiated the US Toxic Substances Control Act (TSCA) reform


According to this reform, the federal Environmental Protection Agency (EPA) must take action on particular chemical substances identified as persistent, bioaccumulative, and toxic (PBT). 


As a result, after thorough Federal TSCA Work Plan for Chemical Assessments, the EPA has decided to restrict the use of the following five substances in products (ref. 40 CFR Part 751):

TSCA : 5 restricted substances in Products
  • PIP (3:1), or Phenol, Isopropylated Phosphate (3:1);
  • DecaBDE, or Decabromodiphenyl Ether. DecaBDE is also one of the PBDEs restricted under RoHS;
  • PCTP, or Pentachlorothiophenol;
  • 2,4,6-TTBP, or 2,4,6-tris(tert-butyl)phenol;
  • HCBD, or Hexachlorobutadiene. The EU Persistent Organic Pollutants (POP) regulation also rules HCBD.

The TSCA Substances Restrictions in Products

The following table portrays substances currently regulated by the US EPA, under the TSCA:

Substance Name (Short Form) CAS_RN_#_ Where Used (Examples) Restriction in Products (Simplified) Effective Dates (Simplified) Reference
PIP (3:1) 68937-41-7
  • Plasticizer and flame retardant in plastics (PVC and others), and resins
  • In adhesives and sealants
  • Functional fluids in aircraft and industrial machinery
  • Prohibition of the manufacture in products and articles (including import) and processing;
  • Exemptions apply to the general prohibition. For example in some recycled plastics or some aerospace, automotive, or military applications;
  • Obligation to inform customers via Safety Data Sheet (SDS) or labeling;
  • Recordkeeping  requirements.

February 5, 2021.

However, different compliance dates apply to exemptions.

180 days extension of the grace period.

Federal Register


Vol. 86, No. 3, RIN 2070–AK58

DecaBDE 1163-19-5

Flame retardant in:

  • Wires, cables,  and rubber casings
  • Electronic equipment casings
  • Building and construction materials
  • Prohibition of the manufacture in products and articles (including import) and processing;
  • Some exemptions to the prohibition apply, for example to recycled plastics;
  • Recordkeeping  requirements.

March 8, 2021.

However, different compliance dates apply to exemptions.

Federal Register


Vol. 86, No. 3, RIN 2070–AK34

PCTP 133-49-3 Rubber products
  • Concentration limit of 1% w/w in articles;
  • Recordkeeping of products and articles containing PCTP.
March 8, 2021

Federal Register

Vol. 86, No. 3, RIN 2070–AK60

2,4,6-TTBP 732-26-3
  • Fuel, oil, and lubricant additive
  • Fuel injector cleaner
  • Concentration limit of 0.3% w/w:
  • in any containers below 35 gallons;
  • as an oil or lubricant additive in any container size.
January 6, 2026


Federal Register

Vol. 86, No. 3, RIN 2070–AK59


HCBD 87-68-3 Production of solvents
  • Prohibition of the manufacture  in products and articles (including import) and processing;
  • Possible exemptions to unintentional production of HCBD as a byproduct;
  • Recordkeeping  requirements.

March 8, 2021

Federal Register

Vol. 86, No. 3, RIN 2070–AK61


Should you have any questions on the TSCA new PBT restrictions in products or need to assess products...

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