Masiku ano, m'modzi mwamakasitomala athu amafuna BPA yaulere muzoyeretsa zathu za 12V zamagalimoto, timadabwitsidwa pang'ono ndi izi.Pambuyo kusaka pa intaneti.tinaphunzira zambiri za izi.Zotsatirazi ndi zomwe zachokera ku wiki.
Bisphenol A (BPA) ndi organic synthetic compound yokhala ndi mankhwala formula (CH3)2C(C6H4OH)2 ya gulu la diphenylmethane zotumphukira ndi bisphenols, ndi magulu awiri hydroxyphenyl.Ndi cholimba chopanda mtundu chomwe chimasungunuka mu zosungunulira za organic, koma chosasungunuka m'madzi.Yakhala ikugwiritsidwa ntchito pamalonda kuyambira 1957.
BPA imagwiritsidwa ntchito popanga mapulasitiki ndi ma epoxy resins.Pulasitiki yopangidwa ndi BPA ndi yomveka komanso yolimba, ndipo imapangidwa kukhala zinthu zosiyanasiyana zomwe anthu amagula, monga mabotolo amadzi, zida zamasewera, ma CD, ndi ma DVD.Ma epoxy resins okhala ndi BPA amagwiritsidwa ntchito kuyika mapaipi amadzi, monga zokutira mkati mwa zitini zambiri za chakudya ndi zakumwa komanso kupanga mapepala otentha monga omwe amagwiritsidwa ntchito pogulitsa malisiti.[2]Mu 2015, pafupifupi matani 4 miliyoni a mankhwala a BPA adapangidwa kuti apange pulasitiki ya polycarbonate, zomwe zimapangitsa kuti ikhale imodzi mwamankhwala apamwamba kwambiri padziko lonse lapansi.
BPA imawonetsa kutsanzira kwa estrogen, zomwe zimakhala ngati mahomoni zomwe zimadzetsa nkhawa za kuyenera kwake pazinthu zina zogula ndi zotengera zakudya.Kuyambira 2008, maboma angapo adafufuza zachitetezo chake, zomwe zidapangitsa ogulitsa ena kuchotsa zinthu za polycarbonate.Bungwe la US Food and Drug Administration (FDA) lathetsa chilolezo chake chogwiritsa ntchito BPA m'mabotolo a ana ndi mapaketi opangira makanda, kutengera kusiyidwa kwa msika, osati chitetezo.[4]European Union ndi Canada aletsa kugwiritsa ntchito BPA m'mabotolo a ana.
A FDA akuti "BPA ndi yotetezeka pazomwe zikuchitika muzakudya" kutengera kafukufuku wambiri, kuphatikiza maphunziro ena awiri omwe adatulutsidwa ndi bungweli koyambirira kwa 2014. [5]The European Food Safety Authority (EFSA) idawunikiranso zatsopano zasayansi pa BPA mu 2008, 2009, 2010, 2011 ndi 2015: akatswiri a EFSA adamaliza nthawi iliyonse kuti sakanatha kuzindikira umboni watsopano womwe ungawatsogolere kuwunikiranso malingaliro awo kuti mulingo wodziwika. kukhudzana ndi BPA ndikotetezeka;komabe, EFSA imazindikira zokayikitsa zina, ndipo ipitiliza kuzifufuza.[6]
Mu February 2016, France idalengeza kuti ikufuna kupanga BPA ngati REACH Regulation candidate substance of very high concern (SVHC).[7]
Nthawi yotumiza: Aug-29-2022