"In general, plastics that are marked with recycle codes 1, 2, 4, 5, and 6 are very unlikely to contain BPA. Some, but not all, plastics that are marked with recycle codes 3 or 7 may be made with BPA."[30]
Type 7 is the catch-all "other" class, and some type 7 plastics, such as polycarbonate (sometimes identified with the letters "PC" near the recycling symbol) and epoxy resins, are made from bisphenol A monomer.[7][31]
Type 3 (PVC) also may contain bisphenol A as an antioxidant in plasticizers.[7] This refers to "flexible PVC", but not for rigids such as pipe, windows, and siding.