| Synonyms: |
4,4'-(1,3-Phenylenebis(azo))bis(1,3-benzenediamine),
4,4'-[1,3-phenylenebis(diazene-2,1-diyl)]di(benzene-1,3-diamine),
Bismark brown Y free base,
C.I. Basic Brown 1
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| Definition: |
A bis(azo) compound that is 1,1'-(1,3-phenylene)bis(diazene) in which both azene hydrogens are replaced by 2,4-diaminophenyl groups. A metachromatic dye which stains acid mucins yellow. It is also a constituent of Papanicolaou's EA solutions, used for cervical, and other smears. Its dihydrochloride salt is also a biological dye known as Bismark brown Y. |