dye|World dye variety

Name:C.I.Direct Brown 50,C.I.20091

Molecular Structure: Double azo class

C.I.Direct Brown 50,C.I.20091,CAS 12262-06-5,518.52,C26H19N6NaO3S,Benzo Brown BR

Molecular Formula:C₂₆H₁₉N₆NaO₃S

Molecular Weight: 518.52

CAS Registry Number:12262-06-5

Manufacturing Methods : 4-Aminonaphthalene-1-sulfonic acid diazo, and Benzene-1,3-diamine coupling, Naphthalen-1-amine diazo again, and the generation of single accidentally coupled nitrogen compounds. In the double coupling reaction usually can form a certain proportion of heterogeneous dye, the situation is different from C.I. Direct Brown 37 (C.I. 20090).

Properties and Applications:  brown. Moderate soluble in water for yellow brown, and adequate soluble in ethanol for orange brown. The strong sulfuric acid for blu-ray black, diluted for orange brown. The dye solution to join strong hydrochloric acid have yellow brown precipitation; Add thick sodium hydroxide solution have orange brown precipitation

List of Suppliers:

Benzo Brown BR IG Farbenindustrie AG )