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Sangano reUS Environmental Protection Agency rakaronga kurambidza kushandiswa kwemethylene chloride muzvinhu zvese zvinoshandiswa nevatengi uye mumaindasitiri nemabhizimisi. Chirongwa chitsva ichi chakauya mushure mekunge sangano iri rapedza ongororo yengozi muna Mbudzi 2022 iyo yakawana kuti kusangana nezvinhu zvinonyungudutsa kunogona kukonzera migumisiro yakaipa pahutano senge chirwere chechiropa nekenza.
Methylene chloride inowanikwa muzvigadzirwa zvakasiyana-siyana, zvinosanganisira zvinonamira, zvinobvisa pendi, uye zvinobvisa mafuta. Inoshandiswawo zvakanyanya sezvinhu zvekugadzira mamwe makemikari. US Environmental Protection Agency inofungidzira kuti vashandi vanopfuura 900,000 nevatengi vanosvika mamiriyoni gumi nemashanu vanogara vachisangana nemethylene chloride.
Musanganiswa uyu ndewechipiri kuongororwa pasi pemutemo weToxic Substances Control Act (TSCA), uyo unorayira kuti Environmental Protection Agency iongorore kuchengetedzeka kwemakemikari matsva neekare ekutengeserana. Chinangwa chesangano iri ndechekumisa kugadzirwa, kugadziriswa uye kuparadzirwa kwemethylene chloride mukati memwedzi gumi nemishanu.
Kumwe kushandiswa kwemethylene chloride hakubvumidzwe kurambidzwa uku, kusanganisira kushandiswa kwayo semushonga wemakemikari. Semuenzaniso, icharamba ichishandiswa mukugadzira hydrofluorocarbon-32 refrigerant, iyo yakagadzirwa senzira yekuchinja dzimwe nzira dzine mukana wekuwedzera kupisa kwepasi rose uye/kana kupera kweozone.
"Tinotenda kuti methylene chloride ichiri yakachengeteka kushandiswa nemauto nehurumende," Michal Friedhoff, mutevedzeri wemukuru weEnvironmental Protection Agency's (EPA) Office of Chemical Safety and Pollution Prevention, akadaro pamusangano nevatori venhau vasati vazivisa. "EPA ichada chiito chekudzivirira kuchengetedzeka kwevashandi."
Mamwe mapoka ezvakatipoteredza akagamuchira chikumbiro chitsva ichi. Zvisinei, vakaratidzawo kunetseka nezvezvisiri pamutemo zvaizobvumira kushandiswa kwemethylene chloride kwemakore gumi anotevera.
Maria Doa, mukuru wezvemitemo yemakemikari kuEnvironmental Defense Fund, akati kushandiswa kwenguva refu kwakadaro kucharamba kuchikonzera njodzi kunharaunda dzinogara pedyo nenzvimbo dzisina mvumo. Doa yakati Environmental Protection Agency inofanira kupfupisa nguva yekusunungurwa kana kuisa mimwe mitemo pakubudisa methylene chloride kubva mumiti iyi.
Zvichakadaro, American Chemistry Council, boka revatengesi rinomiririra vagadziri vemakemikari, yakati mitemo yakarongwa inogona kukanganisa ketani yekugovera. Boka iri rakati mumashoko aro kuti kudzikira nekukurumidza kwekugadzirwa kwemethylene chloride kuchaguma nekuderera kweanopfuura hafu. Boka iri rakati kudzikiswa uku kunogona kuva "nemhedzisiro yakaipa" kune mamwe maindasitiri akadai semishonga, kunyanya kana "vagadziri vakasarudza kumisa kugadzirwa zvachose."
Methylene chloride ndiyo yechipiri pamakemikari gumi ayo Environmental Protection Agency inoronga kuongorora njodzi dzingangoitika kuhutano hwevanhu nenharaunda. Chekutanga, iasbestos. Freedhoff akati mitemo yechinhu chechitatu, perchlorethylene, inogona kunge yakafanana nemitemo mitsva yemethylene chloride, kusanganisira kurambidzwa uye dziviriro yakasimba yevashandi.