Where It Comes From
Manufactured colorant found in printing inks, plastics, polishes, fuels, and imported colored articles; some regions restrict azo dyes that can release carcinogenic amines [1][2].
How You Are Exposed
Mostly at work when making or using dyes, inks, or colored plastics; through skin contact with dyed items, inhaling dusts or mists, or accidental ingestion from contaminated hands [1].
Why It Matters
May irritate skin or eyes; some azo dyes can split into amines linked to cancer, prompting regulatory actions and cautions by EPA and IARC for certain azo dye groups [2][3][4].
Who Is at Risk
Workers in dye/ink production, plastics processing, printing, auto and metalworking shops using colored oils; hobbyists using solvent dyes without protection [1][3].
How to Lower Your Exposure
Use gloves and ventilation; avoid sanding/burning dyed plastics; choose products compliant with azo-dye restrictions (e.g., EU REACH Annex XVII); employers should substitute safer colorants and follow industrial hygiene practices [2][3].
References
- [1]ECHA. Substance Information: Solvent Orange 7 (CAS 3118-97-6).
- [2]ECHA. REACH Annex XVII, Entry 43: Azocolourants and Azodyes (textiles/leather) restriction.
- [3]U.S. EPA. Action Plan for Azo Dyes Derived from Benzidine (2010).
- [4]IARC Monographs Volume 99. Some Aromatic Amines, Organic Dyes, and Related Exposures (2010).