Bisphenol S (BPS)CAS 80-09-1
Marketed as "BPA-free" — same endocrine activity as BPA, sometimes worse.
Toxic Chemical Databases
Substance-specific listings — these flags are for Bisphenol S alone, not for the broader family.
Chemical Type
BPA Replacement — Aromatic Sulfone Diol
Chemical Description
BPS replaced BPA in many "BPA-free" products after regulatory pressure pushed manufacturers off BPA. The chemistry differs only in a sulfone (SO₂) group replacing the methyl bridge between the two phenol rings — but the endocrine activity is essentially the same, and some in-vitro studies suggest BPS may be MORE potent than BPA at certain low-dose endpoints. EU REACH listed BPS as an SVHC in 2017 for endocrine disruption. Now used in thermal-paper receipt coatings (replaced BPA), polycarbonate alternatives, and "BPA-free" epoxy resin systems.
Biological Activity
Severity scores specific to this substance, NOT the parent family average. Differences between siblings are real and meaningful.
Top Health Consequences
- Endocrine disruption equivalent to or greater than BPA
- "BPA-free" marketing claim is materially misleading
- REACH SVHC for endocrine-disruption properties
- Same product applications as BPA — substitution doesn't reduce exposure
Pathways of Exposure
- Migration from "BPA-free" polycarbonate-substitute products
- Skin absorption from current-formulation thermal receipts
- Food contact from "BPA-free" epoxy can liners
Building Materials with Bisphenol S
Listed alphabetically — product categories where this specific substance appears.
"BPA-Free" Epoxy Linings
"BPA-Free" Polycarbonate Products
BPA-Free Plastic Components
Current-Formulation Thermal Paper Receipts