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I-US Environmental Protection Agency iphakamise ukuvimbela ukusetshenziswa kwe-methylene chloride kuzo zonke izinhlelo zokusebenza zabathengi kanye nezimboni eziningi nezentengiselwano. Lesi siphakamiso esisha siza ngemuva kokuba i-ejensi iqede ukuhlolwa kwengozi ngoNovemba 2022 okwathola ukuthi ukuchayeka ezincibilikisini kungabangela imiphumela emibi empilweni njengesifo sesibindi nomdlavuza.
I-Methylene chloride itholakala emikhiqizweni eyahlukahlukene, okuhlanganisa izinto zokunamathisela, izihluzi zopende, kanye nezisusa amafutha. Isetshenziswa kabanzi njengezinto zokusetshenziswa ekukhiqizeni amanye amakhemikhali. I-US Environmental Protection Agency ilinganisela ukuthi abasebenzi abangaphezu kuka-900,000 kanye nabathengi abayizigidi ezingu-15 bavame ukuchayeka ku-methylene chloride.
Le nhlanganisela ingeyesibili ukuhlolwa ngaphansi koMthetho Wokulawula Izinto Ezinobuthi (TSCA) obuyekeziwe, odinga ukuthi i-Environmental Protection Agency ibuyekeze ukuphepha kwamakhemikhali amasha nalawo akhona ebhizinisini. Umgomo wale nhlangano ukuqeda ukukhiqizwa, ukucutshungulwa kanye nokusatshalaliswa kwe-methylene chloride zingakapheli izinyanga ezingu-15.
Okunye ukusetshenziswa kwe-methylene chloride akuvunyelwe kulokhu kuvinjelwa, okuhlanganisa nokusetshenziswa kwayo njenge-ejenti yamakhemikhali. Isibonelo, izoqhubeka nokusetshenziswa ekukhiqizweni kwe-hydrofluorocarbon-32 refrigerant, eyasungulwa njengendlela ehlukile kunezinye izindlela ezinamandla aphezulu okufudumala komhlaba kanye/noma ukuncipha kwe-ozone.
“Sikholelwa ukuthi i-methylene chloride ihlala iphephile ukusetshenziswa kwezempi kanye nohulumeni,” kusho uMichal Friedhoff, umphathi ohlangene we-Environmental Protection Agency's (EPA) Office of Chemical Safety and Pollution Prevention, engqungqutheleni yabezindaba ngaphambi kwesimemezelo. “I-EPA izodinga isinyathelo sokuvikela ukuphepha kwabasebenzi.”
Amanye amaqembu ezemvelo amukele lesi siphakamiso esisha. Kodwa-ke, aphinde azwakalisa ukukhathazeka mayelana nokungafani nomthetho okuzovumela ukusetshenziswa okuqhubekayo kwe-methylene chloride okungenani iminyaka eyishumi ezayo.
UMaria Doa, umqondisi omkhulu wenqubomgomo yamakhemikhali e-Environmental Defense Fund, uthe ukusetshenziswa okunjalo kwesikhathi eside kuzoqhubeka nokuba yingozi emiphakathini ehlala eduze kwezindawo ezingavunyelwe. UDoa uthe i-Environmental Protection Agency kufanele inciphise isikhathi sokukhululwa noma ibeke imikhawulo eyengeziwe ekukhishweni kwe-methylene chloride kulezi zitshalo.
Khonamanjalo, i-American Chemistry Council, iqembu lezohwebo elimele abakhiqizi bamakhemikhali, ithe imithetho ehlongozwayo ingathinta uchungechunge lokuhlinzekwa kwempahla. Leli qembu lithe esitatimendeni ukuthi ukwehla okusheshayo kokukhiqizwa kwe-methylene chloride kuzoholela ekwehleni okungaphezu kwesigamu. Leli qembu lithe ukwehla kungaba "nomthelela omkhulu" kwezinye izimboni ezifana nemithi, ikakhulukazi uma "abakhiqizi benquma ukuyeka ngokuphelele ukukhiqizwa."
I-Methylene chloride ingeyesibili kwamakhemikhali ayi-10 i-Environmental Protection Agency ehlela ukuwahlola ukuze ithole izingozi ezingaba khona empilweni yabantu kanye nasemvelweni. Okokuqala, yi-asbestos. UFreedhoff uthe imithetho yento yesithathu, i-perchlorethylene, ingafana nemithetho emisha ye-methylene chloride, okuhlanganisa nokuvinjelwa kanye nokuvikelwa kwabasebenzi okuqinile.