• 1 January 1977
    • journal article
    • research article
    • Vol. 23  (9) , 50-52
Abstract
The urine from 22 workers in long-term contact with direct azo dyes (direct black 3, direct diazo black, direct pure blue, direct light fast KU) was studied. Benzidine was found in the urine of 8 workers and dianisidine in 3. Metabolic decomposition of the dyes concerned to free blastomogenic agents occurs in humans.

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