4-Aminobiphenyl

Past use in dye/rubber-chemical manufacture; present in tobacco smoke; possible industrial emissions [1][2].

Breathing cigarette smoke or secondhand smoke; workplace inhalation or skin contact in facilities handling aromatic amines, dyes, or rubber chemicals [1][2].

Known human carcinogen (IARC Group 1; NTP). Strongly linked to urinary bladder cancer; risk increases with cumulative exposure [1][2].

Smokers; people exposed to secondhand smoke at home, in cars, or in indoor public places; workers in dye/rubber/chemical manufacturing or labs [1][2].

Don’t smoke and avoid secondhand smoke; make homes and cars smoke-free [3]. At work, use closed systems, ventilation, gloves, and protective clothing; follow exposure monitoring and hygiene practices [1][2].