dye|World dye variety

Name:C.I.Direct Brown 62,C.I.31720

Molecular Structure: trisazo class

C.I.Direct Brown 62,C.I.31720,CAS 8003-56-3,846.73,C36H25N8Na3O9S2,Benzo Chrome Brown R

Molecular Formula:C₃₆H₂₅N₈Na₃O₉S₂

Molecular Weight: 846.73

CAS Registry Number:8003-56-3

Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding,first coupled with 2-Hydroxybenzoic acid, then with 5-Aminonaphthalene-2-sulfonic acid and 8-Aminonaphthalene-2-sulfonic acid coupling, its product to diazo, and 2,4-Diamino-5-methylbenzenesulfonic acid coupling.

Properties and Applications: red light brown. Soluble in water for orange brown, slightly soluble in alcohol. In the dark for the strong sulfuric acid, diluted is shallow brown. The dye solution to join strong hydrochloric acid with brown precipitation; Add thick sodium hydroxide solution for orange brown, have precipitation.

List of Suppliers:

Benzo Chrome Brown R( Bayer Group )