He ʻIkepili o Bisphenol A BPA
I hana mua ʻia i ka makahiki 1936 ma ke ʻano he estrogen synthetic, ua hana ʻia ka bisphenol A (BPA) i kēia manawa ma kahi nui o ka makahiki ma mua o 6 biliona paona. Hoʻohana pinepine ʻia ka Bisphenol A BPA ma ke ʻano he poloka kūkulu no nā plastics polycarbonate, i loaʻa i nā huahana e like me nā ʻōmole pēpē, nā ʻōmole wai, nā resins epoxy (nā uhi e uhi ana i nā ipu meaʻai), a me nā sila niho keʻokeʻo. Hoʻohana ʻia hoʻi ia ma ke ʻano he mea hoʻohui i nā ʻano plastics ʻē aʻe no ka hana ʻana i nā mea pāʻani a nā keiki.

Hoʻokumu nā molekala Bisphenol A BPA i nā polymers ma o nā "ester bond" e hana i nā plastics polycarbonate. Ma ke ʻano he ʻāpana koʻikoʻi o ka polycarbonate, ʻo BPA ka ʻāpana kemika mua i loko o kēia ʻano plastic.

ʻO Bisphenol A - ka ʻāpana koʻikoʻi i ka hana polycarbonate, e hāʻawi ana i nā plastics me ka moakāka kūikawā a me ke kūpaʻa i ka hopena. Kaomi ma aneʻi e kiʻi i nā ʻōlelo hoʻēmi a me nā lawelawe hui no Bisphenol A.