Research of the stability and transformation rules of bisphenols migrated from food packagings

The stability and transformation products of bisphenol A diglycidyl ether( BADGE) and its derivatives from three- piece metal cans in simulants after different sterilizing processes were studied,and the transformation rules of these compounds under different storage conditions were further explored. Results showed that after atmospheric pressure sterilization and during the storage,BADGE,BADGE·H₂O and BADGE·HCl hydrolyzed and transformed to their hydrates.BADGE·H₂O·HCl,BADGE·2H₂O and BADGE·2HCl were stable under the same conditions.However,the chloride of BADGE in ethanol transformed into BADGE and its hydrates after high pressure sterilizing.The study provided the references for the analysis of migrations of bisphenols from metal packaging materials.