Bismarck Brown Y

Property Data Common name Suggested name Other names   C.I. number C.I. name Class Ionisation Solubility aqueous Solubility ethanol Absorption maximum Colour Empirical formula Formula weight Bismarck brown Bismarck brown Y Manchester brown Phenylene brown 21000 Basic brown 1 Azo Basic 1.36% 1.08% 463 (Conn), 457 (Aldrich) Brown C18H20N8Cl2 419.336

More commonly used in the past than it is now, Bismarck brown Y is a metachromatic dye which stains acid mucins yellow. It is also a constituent of Papanicolaou's EA solutions, used for cervical, and other, smears.

 

Reference
R. D. Lillie.
Conn's Biological Stains
Williams & Wilkins, Baltimore, MD., U.S.A.

Aldrich chemical catalogue, 1992
Aldrich Chemical Company, Milwaukee, WI, USA.

Susan Budavari, Editor, (1996)
The Merck Index, Ed. 12
Merck & Co., Inc., Whitehouse Station, NJ, USA