Physical Properties of Bisphenol S Bisphenol S is white acicular crystal. Easily soluble in aliphatic hydrocarbon, soluble in ethanol, isopropyl alcohol, 2-ethyl hexyl alcohol, acetonitrile, acetone, slightly soluble in aromatics, slightly soluble in ethyl acetate, methyl isobutanone, insoluble in toluene, water. The molecule contains two hydroxyl groups and a strong electron â?? absorbing sulfone group, so the acid is stronger than other phenols. Low toxicity. Bisphenol S Uses Bisphenol S is mainly used as dye fixing agent. It can also be used as plating solution additive, leather tanning agent, dispersant for high temperature dyeing of disperse dyes, phenolic resin hardening promoter, resin flame retardant, etc. It can also be used as pesticides, dyes, additives intermediate. As a substitute for bisphenol A, it can be used as a raw material for polycarbonate, epoxy resin, polyester, phenolic resin, and polysulfone, polyether sulfone. It can be also used in the manufacturing of color photographic materials, photographic contrast enhancers, thermal recording materials (color development agents), domestic/daily surfactants and high efficiency deodorants. It can be used to manufacturing fixing agent A . Bisphenol S Production Process The existing synthesis technology of Bisphenol S is to synthesize Bisphenol S with sulfuric acid and phenol in the presence of solvent trimethylbenzene and inhibitors at high temperature of 230