Bismark Brown Y
Title: Bismark Brown Y
CAS Registry Number: 10114-58-6
CAS Name: 4,4¢-[1,3-Phenylenebis(azo)]bis[1,3-benzenediamine] dihydrochloride
Additional Names: C.I. Basic Brown 1; 4,4¢-[m-phenylenebis(azo)]bis[m-phenylenediamine] dihydrochloride; C.I. 21000; phenylene brown
Molecular Formula: C18H20Cl2N8
Molecular Weight: 419.31
Percent Composition: C 51.56%, H 4.81%, Cl 16.91%, N 26.72%
Literature References: Prepd by reaction of m-phenylenediamine HCl and nitrous acid: F. J. Welcher, Organic Analytical Reagents (D. Van Nostrand Co., New York, 1948) p 339; Colour Index vol. 4 (3rd ed., 1971) p 4154.
Properties: Blackish-brown powder. Very sol in water; slightly sol in ethanol, Cellosolve. Practically insol in acetone, benzene carbon tetrachloride. In concd H2SO4 gives brown soln; in concd nitric acid gives orange soln which turns yellow.
Use: As a textile dye, biological stain.

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