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Direct Brown 62

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

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.

Standard Acid Resistance Alkali Resistance Light Fastness Soaping Water
Fading Stain Fading Stain
ISO 1 3-4 2 1-2 2

List of Suppliers:

Benzo Chrome Brown R( Bayer Group )


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