an azo group or radical
Source Synthetic `coal tar" dye and azo dye (see glossary).
While the Indian government first banned the use of benzidine in 1995, it has now banned 116 azo dyes.
Suggested by Daved Wachsman (19 May 2013)
Dealt a Bad Hand
Suggested by Daved Wachsman (18 May 2013)
Battered Child Sy...
Elephant Man's Di...
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