Bisphenol A (BPA) is not used as a plasticiser in plastics; it is an intermediate used in the manufacture of either polycarbonate plastic or epoxy resins. More than 99% of BPA is converted into polymers such as polycarbonate plastic and epoxy resins. Only a very small amount portion of all the produced BPA that is produced is used as an essential antioxidant in soft PVC plastics or as a developing agent for thermal paper.