dye|World dye variety

Name:C.I.Direct Red 42,C.I.22180

Molecular Structure: Double azo class

C.I.Direct Red 42,C.I.22180,CAS 6548-39-6,814.71,C32H21N6Na3O10S3,Benzo Rubine HW

Molecular Formula:C₃₂H₂₁N₆Na₃O₁₀S₃

Molecular Weight: 814.71

CAS Registry Number:6548-39-6

Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding, first and 6-Aminonaphthalene-1,3-disulfonic acid coupling, and then in alkaline conditions and 7-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling.

Properties and Applications: dark blue light red. Soluble in water for product red, slightly soluble in ethanol for shallow peachblossom. The strong sulfuric acid in blue, diluted for Shallow red time The dye solution to join strong hydrochloric acid for red light brown, have precipitation; Add thick sodium hydroxide solution for orange brown.

List of Suppliers:

Benzo Rubine HW( Bayer Group )