Where It Comes From
Manufactured azo dye used in dyeing and printing; can be released in wastewater from textile finishing and cleaning of equipment [3].
How You Are Exposed
Workers may breathe dye dust/mist or get skin contact when handling powders, solutions, or dyed materials; the public may contact residual dyes in clothing or be exposed via water near dyeing facilities [3][4].
Why It Matters
Certain azo dyes (notably benzidine-based) are known human carcinogens because they can release carcinogenic aromatic amines; minimizing exposure to azo dyes is prudent when specifics are uncertain [1][2]. Dyes can also cause eye/skin irritation and allergic dermatitis in some people [4].
Who Is at Risk
Dye production and textile/printing workers; hobby dyers; people with eczema or dye allergies; communities near untreated textile wastewater discharges [3][4].
How to Lower Your Exposure
At work—use closed handling, local exhaust, gloves, and protective clothing; follow NIOSH skin protection guidance [4]. At home—wash new dark/red garments before wear and separately, avoid items that bleed color, and support proper wastewater treatment [3].
References
- [1]IARC Monographs Vol. 99: Some Aromatic Amines, Organic Dyes, and Related Exposures (2010).
- [2]NTP Report on Carcinogens: Benzidine and dyes metabolized to benzidine (Known to be human carcinogens).
- [3]U.S. EPA Effluent Guidelines: Textile Mills (Textiles category).
- [4]CDC/NIOSH. Skin Exposures and Effects (Dermal exposure guidance).