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I-Ejensi yokuVikelwa kweBhoduluko ye-US iphakamise ukukhandela ukusetjenziswa kwe-methylene chloride kizo zoke iinsetjenziswa zabathengi kanye nezebubulo nezokurhweba. Isiphakamiso esitjha siza ngemva kobana i-ejensi iqede ukuhlolwa kwengozi ngoNobayeni 2022 eyathola bona ukuvezwa eentweni ezitjhugululako kungabangela imiphumela emimbi yezamaphilo efana nobulwelwe besibindi nomdlavuza.
I-Methylene chloride itholakala emikhiqizweni ehlukahlukeneko, okufaka hlangana iinnamatheli, iinhluthu zepende, kanye neenkhupha amafutha. Isetjenziswa khulu njengesisetjenziswa sokwenza amanye amakhemikhali. I-Ejensi yokuVikela iBhoduluko ye-US ilinganisela bona abasebenzi abangaphezu kwe-900,000 nabathengi abaziingidi ezili-15 bahlala bavezwa ku-methylene chloride.
Ikhompawundi le ngeyesibili ezakuhlolwa ngaphasi komThetho wokuLawulwa kwezinto ezinobuthi (i-TSCA) obuyekeziweko, ofuna bona i-Ejensi yokuVikelwa kweBhoduluko ibuyekeze ukuphepha kwamakhemikhali amatjha nalawo akhona wokuthengisa. Umnqopho we-ejensi kuqeda ukukhiqizwa, ukusetjenziswa nokusabalaliswa kwe-methylene chloride kungakapheli iinyanga ezili-15.
Okunye ukusetjenziswa kwe-methylene chloride akukavunyelwa ukuvinjelwa lokhu, kufaka hlangana ukusetjenziswa kwayo njenge-ejenti yamakhemikhali. Ukwenza isibonelo, izakuragela phambili nokusetjenziswa ekukhiqizeni i-hydrofluorocarbon-32 refrigerant, eyakhiwe njengenye indlela yokusebenzisa ezinye iindlela ezinekghono eliphezulu lokufuthumala kwephasi kanye/nofana ukuphela kwe-ozone.
"Sikholelwa bona i-methylene chloride ihlala iphephile ekusetjenzisweni kwebutho nezombuso," u-Michal Friedhoff, umlawuli we-Environmental Protection Agency's (EPA) Office of Chemical Safety and Pollution Prevention, watjho emhlanganweni weendaba ngaphambi kokumenyezelwa. "I-EPA izokutlhoga igadango lokuvikela ukuphepha kwabasebenzi."
Amanye amaqembu wezebhoduluko amukele isiphakamiso esitjha. Nanyana kunjalo, baveze ukutshwenyeka ngokungafani nomthetho ozokuvumela ukusetjenziswa kwe-methylene chloride okungenani iminyaka elitjhumi ezako.
U-Maria Doa, umnqophisi omkhulu womthethomgomo wamakhemikhali esiKhwameni sokuVikela iBhoduluko, wathi ukusetjenziswa kwesikhathi eside okunjalo kuzokuragela phambili nokubeka ubungozi emiphakathini ehlala eduze neendawo ezingavunyelwe. U-Doa uthe i-Ejensi yokuVikelwa kweBhoduluko kufanele inciphise isikhathi sokukhululwa namkha ibeke imikhawulo eyengeziweko ekukhutjhweni kwe-methylene chloride evela eentjalweni lezi.
Khatheso, i-American Chemistry Council, isiqhema sezokurhweba esijamele abakhiqizi bamakhemikhali, sathi imithetho ehlongozwako ingathinta indlela yokuthengisa. Isiqhema sithe esitatimendeni sokuthi ukwehla okurhabako kokukhiqizwa kwe-methylene chloride kuzokurholela ekwehleni okungaphezu kwesigamu. Isiqhema sathi ukusikwa kungaba "nomthelela omkhulu" kezinye iimboni ezifana nemithi, khulukhulu nangabe "abakhiqizi banquma ukumisa ukukhiqiza ngokupheleleko."
I-Methylene chloride ngekhemikhali yesibili emakhemikhali ali-10 i-Ejensi yokuVikela iBhoduluko ehlela ukuyihlola malungana nobungozi obungaba khona epilweni yabantu nebhoduluko. Kokuthoma, yi-asbestos. U-Freedhoff uthe imithetho yento yesithathu, i-perchlorethylene, ingafana nemithetho etja ye-methylene chloride, okufaka hlangana ukuvinjelwa nokuvikelwa kwabasebenzi okuqinileko.