BPA release can occur when exposed to which factors?

• A. Cold storage
• B. Mechanical wear
• C. Moisture
• D. Heat or UV light

Answer: (D)

BPA migration from plastics is driven by temperature and light exposure. When plastics like polycarbonate or epoxy-coated materials are heated, molecules gain mobility and BPA can diffuse more readily to the surface and into foods or liquids. UV light can also degrade the polymer matrix through photo-oxidation, creating pathways for BPA to leach out. Cold storage slows these processes, so it does not promote release. Mechanical wear might roughen surfaces but doesn’t inherently cause BPA to release unless the material has already degraded, and moisture alone isn’t a primary driver of BPA migration under typical conditions. Therefore, heat or UV light are the factors that promote BPA release.