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I-Arhente yoKhuseleko lweNdalo yase-US iphakamise ukuthintela ukusetyenziswa kwe-methylene chloride kuzo zonke izicelo zabathengi kunye nezona mveliso kunye nezorhwebo. Esi siphakamiso sitsha siza emva kokuba i-arhente igqibe uvavanyo lomngcipheko ngoNovemba ka-2022 olufumanise ukuba ukuchatshazelwa zizinyibilikisi kunokubangela iziphumo ezibi zempilo ezifana nesifo sesibindi kunye nomhlaza.
I-Methylene chloride ifumaneka kwiimveliso ezahlukeneyo, kuquka izinto zokuncamathelisa, izihluzi zepeyinti, kunye nezihluzi-mafutha. Ikwasetyenziswa kakhulu njengezinto zokwenza ezinye iikhemikhali. I-Arhente yoKhuseleko lweNdalo yase-US iqikelela ukuba abasebenzi abangaphezu kwama-900,000 kunye nabathengi abazizigidi ezili-15 basoloko bechatshazelwa yi-methylene chloride.
Le khompawundi yeyesibini ukuvavanywa phantsi koMthetho oHlaziyiweyo woLawulo lweZinto eziTyhefu (iTSCA), ofuna ukuba i-Environmental Protection Agency ihlolisise ukhuseleko lweekhemikhali ezintsha nezikhoyo zorhwebo. Injongo yale arhente kukuphelisa imveliso, ukucubungula kunye nokusasazwa kwe-methylene chloride kwiinyanga ezili-15.
Ezinye iindlela zokusebenzisa i-methylene chloride azinalo olu thintelo, kuquka nokusetyenziswa kwayo njenge-arhente yeekhemikhali. Umzekelo, iya kuqhubeka isetyenziswa ekuvelisweni kwe-hydrofluorocarbon-32 refrigerant, eyaphuhliswa njengendlela eyahlukileyo kwezinye iindlela ezinomlinganiselo ophezulu wokufudumala kwehlabathi kunye/okanye ukupheliswa kwe-ozone.
“Sikholelwa ukuba i-methylene chloride ihlala ikhuselekile ukusetyenziswa emkhosini nakurhulumente,” utshilo uMichal Friedhoff, umlawuli oncedisayo we-Ofisi yoKhuseleko lweeKhemikhali kunye noThintelo loNgcoliseko lweNdalo (i-EPA), kwinkomfa yabezindaba ngaphambi kwesi sibhengezo. “I-EPA iya kufuna amanyathelo okukhusela ukhuseleko lwabasebenzi.”
Amanye amaqela okusingqongileyo ayamkele esi siphakamiso sitsha. Nangona kunjalo, akwabonakalise inkxalabo malunga nezinto ezingaqhelekanga kumthetho eziza kuvumela ukusetyenziswa kwe-methylene chloride ubuncinane kwiminyaka elishumi ezayo.
UMaria Doa, umlawuli ophezulu wemigaqo-nkqubo yeekhemikhali kwi-Environmental Defense Fund, uthe ukusetyenziswa okunjalo kwexesha elide kuya kuqhubeka kubeka iingozi kuluntu oluhlala kufutshane neendawo ezikhululekileyo. UDoa uthe i-Environmental Protection Agency kufuneka inciphise ixesha lokukhululwa okanye ibeke imiqathango eyongezelelweyo ekukhutshweni kwe-methylene chloride kwezi zityalo.
Okwangoku, i-American Chemistry Council, iqela lezorhwebo elimele abavelisi beekhemikhali, ithe imithetho ecetywayo inokuchaphazela uthungelwano lokubonelela. Eli qela lithe kwingxelo ukuba ukwehla ngokukhawuleza kwemveliso ye-methylene chloride kuya kubangela ukwehla okungaphezulu kwesiqingatha. Eli qela lithe ukuncipha kunokuba "nefuthe elikhulu" kwamanye amashishini afana namayeza, ingakumbi ukuba "abavelisi bagqiba ekubeni bayeke ngokupheleleyo ukuvelisa."
I-Methylene chloride yeyesibini kwiikhemikhali ezili-10 i-Arhente yoKhuseleko lweNdalo eceba ukuzivavanya ukuze ibone iingozi ezinokubakho kwimpilo yabantu nakwindalo esingqongileyo. Okokuqala, yi-asbestos. UFreedhoff uthe imithetho yesithako sesithathu, i-perchlorethylene, ingafana nemithetho emitsha ye-methylene chloride, kuquka ukuvalwa kunye nokukhuselwa kwabasebenzi okungqongqo.