B 1920 (OTTO) Bisphenol A, 98% Cas 80-05-7 - used for policarbonate and epoxy resins. B 1920 (OTTO) Bisphenol A, 98% Cas 80-05-7 - used in the production of polycarbonate plastics which is utilized to make various consumer goods like water bottles, sports equipment, medical devices, eyeglass lenses, house hold electronics, compact discs (CDs) and digital versatile discs (DVDs).