dye|World dye variety

Name:C.I.Direct Red 60,C.I.22200

Molecular Structure: Double azo class

C.I.Direct Red 60,C.I.22200,CAS 6486-49-3,814.71,C32H21N6Na3O10S3

Molecular Formula:C₃₂H₂₁N₆Na₃O₁₀S₃

Molecular Weight: 814.71

CAS Registry Number:6486-49-3

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

Properties and Applications: blue-ray red. Soluble in water for wine red, soluble in ethanol for red orange. In the dark for the strong sulfuric acid or purple, for the red light brown after diluted. Dye with strong hydrochloric acid solution for the red light brown, have precipitation; Add thick sodium hydroxide solution for red light orange brown.

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