Benzidine Dye

Name:
Benzidine Dye
Detailed information:
Any of a group of azo dyes derived from 3,3′-dichlorobenzidine; they include yellow and orange colors claimed to be lightfast and alkali-resistant. Congo red is derived from benzidine and naphthionic acid.

Hazard:

These compounds are highly toxic and carcinogenic. Physical contact with them should be avoided.