1.Isoko ry'isoko
Muri iki ciyumviro, igiciro ca benzene gisukuye kiraguma gihagaze mu gihe c’inyamaswa y’inzoka y’inzoka iduga gatoyi, ariko mu gihe gito nta n’inguvu ziduga ziguma ziri hejuru kugira ngo ugume uguhinduka guke . Ibindi bikoresho vya mbere, nka MIBK, umugera wa carbon, acetone, cyclohexymine na tert-butrymimine, vyari bihamye .
Ico gikoresho cagumye gihamye muri iki ciyumviro . Kubera urugero ruto rw’aniline, ibikoresho vy’ishimikiro vy’ishimikiro, n’ukubura umushinge w’ukwiyongera kw’igiciro c’umurongozi, ibiciro vy’ukurikirana vyari vyagumye ku rugero rwo muri iki gihe.
Igiciro c’umuti co kurwanya ugukura nticari carahindutse muri iki ciyumviro, ariko ugutanga kiracari gikomeye, kandi ikintu c’uruganda ku bijanye no kurungikwa kiracariho . Igenzura ry’igihugu ry’uguhingura nitrobenzene ntiryarangiriye, kandi hariho ibintu bidatomoye mu gushikama kw’ibikoresho, rero biracirwa urubanza mu gihe gito ko igiciro c’umuti wo kurwanya ugusaza kizoguma ari kinini .
Ivyo gutanga ikibiriti n’ivyuma vy’umukara vy’umukara n’ivyuma vy’ivyatsi vy’ivyatsi vy’ivyatsi vy’ivyatsi vy’ivyatsi vy’ivyatsi vy’ivyatsi vy’ivyatsi vy’ivyatsi vy’ivyatsi vy’ivyatsi vy’ivyatsi vy’ivyatsi vy’ivyatsi (zinc oxide) birarengeje urugero, igicuruzwa kirashikirwa cane n’igiciro, ibiciro birashikamye, kandi inyungu iri mu gihe gikwiriye .