Benzidine dye

Description

A group of azo dyes derived from 3,3'-dichlorobenzidine that have lightfast yellow and orange colors. Examples are Congo red and Diarylide dye.

Synonyms and Related Terms

benzidine yellow; colorante de bencidina (Esp.); coloranti a base di benzidina (It.); azo dye; diarylide dye; Congo red; benzidine orange

Hazards and Safety

Highly toxic. Human carcinogen, often causing bladder cancer.

Authority

• Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993

• Monona Rossol, The Artist's Complete Health and Safety Guide, Allworth Press, New York, 1994

• Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997