Bisphenol A is used to make:
- polycarbonate plastics (typically very hard, clear plastics, such as hard, reusable water bottles and children’s sippy cups)
- the resins that line food cans
- some dental materials, such as sealants or composite fillings, which contain low amounts of BPA derivatives (BPA is only present in saliva for up to 3 hours after a dental procedure that uses sealants or composite fillings)
Some reports suggest that bisphenol A may leach out of polycarbonate plastics, food can linings and other materials, possibly exposing humans to levels that are higher than the current suggested safe levels.
Many plastics have a recycling code (1–7) on them, usually at the bottom of the container. Polycarbonate plastics are labelled with a recycling code 7 and may contain BPA.