NgoSepthemba 18, 2024, i-US Environmental Protection Agency (EPA) yamemezela ukuthi izokwenza ukuhlolwa kwengozi okusalungiswa kwento yamakhemikhali i-1,3-butadiene futhi ifuna ukuqokwa kochwepheshe besayensi nezobuchwepheshe ukuze basebenze njengamalungu ephaneli yokubuyekezwa kontanga. Lesi sinyathelo sihambisana nezimfuneko zoMthetho Wokulawulwa Kwezinto Eziwubuthi (i-TSCA), okuhloswe ngawo ukuhlola ukuthi ingabe ikhemikhali ibeka engcupheni ngendlela engafanele empilweni yomuntu noma endaweni ezungezile.
I-1,3-Butadiene iyigesi eguquguqukayo, engenambala esetshenziswa kabanzi ekusetshenzisweni kwe-petrochemical kanye nokukhiqizwa kwama-polymers ahlukahlukene kanye nama-elastomers. Ngokusho kwedatha ye-EPA, umthamo wonyaka wokukhiqiza waleli khemikhali uphakathi kwamaphawundi ayizigidi eziyizinkulungwane ezingu-1 nezingu-5. Ngokuyinhloko idluliselwa emoyeni, ngokuncibilika kwamanzi aphansi, kanye nedatha yokukhululwa kwemvelo ibonisa ukuthi ngaphezu kwe-98% ye-1,3-butadiene emissions ingena emkhathini. I-EPA ihlukanise i-1,3-butadiene njenge-carcinogen yomuntu, futhi izifundo ze-epidemiological zibonise ukuthi ukuchayeka ku-1,3-butadiene kuhlotshaniswa nokwanda kwezigameko ze-leukemia phakathi kwabasebenzi. Ukwengeza, ikhemikhali ingase ibangele ukuncipha kwesisindo somntwana kanye nemiphumela ye-hematological.
Injongo yokuhlola ubungozi kwe-EPA ukuhlola amakhemikhali asohlwini njengabaluleke kakhulu ngaphansi kwesigaba 6(b) se-TSCA. Lokhu kuhlola ubungozi kuzobandakanya ukuhlolwa kwezinto ezibonakalayo namakhemikhali, isiphetho semvelo nezokuthutha, ukukhishwa kwemvelo, ukuchayeka kubasebenzi kanye nomphakathi jikelele, kanye nokuhlolwa kobungozi bemvelo kanye nempilo yabantu. Ukuze uthole ulwazi olwengeziwe mayelana nezigaba ezintathu zenqubo yokuhlola ubungozi be-TSCA kumakhemikhali akhona ( ie, ukubeka phambili, ukuhlola ubungozi, nokulawulwa kobungozi), iya ku-http://www.epa.gov/assessing-and-managing-chemicals-under-tsca
Ukuqinisekisa ubuqotho besayensi kanye nokunemba kokuhlola, i-EPA ifuna ukuphakanyiswa komphakathi kososayensi nochwepheshe bezobuchwepheshe ukuze babambe iqhaza ekubuyekezweni kontanga kweKomidi Lokweluleka Kwesayensi Lamakhemikhali (i-SACC). Iziphakamiso kumele zifike ngo-Okthoba 18. I-SACC iyiqembu elizimele labeluleki elinamalungu angama-20 anolwazi nge-toxicology, ukuhlola ubungozi bemvelo, ukuhlola ukuchayeka, kanye nezinye izindawo. I-EPA ihlela ukushicilela ukuhlolwa kwengozi okusalungiswa ku-Federal Register ekwindla ka-2024 futhi icele ukuphawula komphakathi. Ukubuyekezwa kontanga kuhlelelwe ukuthi kwenzeke ekuqaleni kuka-2025.
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