Bisphenol S is an organic chemical compound used in polymer matrices. It is found in epoxy resins, polycarbonate, polyethersulfone, thermal papers, phenolic resins and polyester resins. In general, the use of Bisphenol S is coupled with that of Bisphenol F but especially Bisphenol A, classified as a substance of concern.
The toxicity of Bisphenol S is equivalent to that of Bisphenol A (BPA). It must therefore be measured in a laboratory.