dye|World dye variety

Name:C.I.Acid Black 4,C.I.35420

Molecular Structure: Multi-azo class

C.I.Acid Black 4,C.I.35420,CAS 7237-45-8,1473.21,C55H38N10Na6O21S5,Silk Printing Black M

Molecular Formula:C₅₅H₃₈N₁₀Na₆O₂₁S₅

Molecular Weight: 1473.21

CAS Registry Number:7237-45-8

Manufacturing Methods : 4,4′-Diamino-3,3′-Biphenyldisulfonic acid double nitriding, and 2-Amino-4-methylanisole (2 Moore) coupled, product to double nitriding, in alkaline conditions and 3-Amino-5-hydroxynaphthalene-2,7-disulfonic acid (1 Moore) and 4-(8-Hydroxy-6-sulfonaphthalen-2-ylamino)benzoic acid  (1 Moore) coupled.

Properties and Applications: red light black. Soluble in water for violet black, not soluble in alcohol. The strong sulfuric acid for blue, blue for red after diluted. The dye solution to join strong hydrochloric acid for dark; Add thick sodium hydroxide solution for blue-ray black.

List of Suppliers:

Silk Printing Black M ( IG Farbenindustrie AG )