Isishwankathelo seBisphenol A BPA
Ekuqaleni iveliswa ngo-1936 njenge-estrogen yokwenziwa, i-bisphenol A (BPA) ngoku yenziwa ngomthamo wonyaka odlula iibhiliyoni ezi-6 zeepawundi. I-Bisphenol A BPA isetyenziswa kakhulu njengebhloko yokwakha iiplastiki ze-polycarbonate, ezifumaneka kwiimveliso ezifana neebhotile zabantwana, iibhotile zamanzi, ii-epoxy resins (iingubo ezigquma izikhongozeli zokutya), kunye nezitywina zamazinyo ezimhlophe. Ikwasetyenziswa njengesongezelelo kwezinye iintlobo zeplastiki zokwenza izinto zokudlala zabantwana.

Iimolekyuli zeBisphenol A BPA zenza iipolymers ngokusebenzisa "iibhondi ze-ester" ukwenza iiplastiki zepolycarbonate. Njengenxalenye ephambili yepolycarbonate, iBPA yeyona khemikhali iphambili kolu hlobo lweplastiki.

I-Bisphenol A – eyona nto iphambili kwimveliso ye-polycarbonate, inika iiplastiki ukukhanya okugqwesileyo kunye nokumelana nempembelelo. Cofa apha ukuze ufumane iikowuteshini ezincitshisiweyo kunye neenkonzo zeqela le-Bisphenol A.