9-[(4-Amino-2-sodiosulfophenyl)amino]-11-methyl-7-phenyl-5-phenylamino-4-sulfonatobenzo[a]phenazin-7-ium

The Uses of 9-[(4-Amino-2-sodiosulfophenyl)amino]-11-methyl-7-phenyl-5-phenylamino-4-sulfonatobenzo[a]phenazin-7-ium

The primary amino group of Wool Fast Blue FFG 20 can react with cyanuric chloride or with cyanuric fluoride and subsequently with aminobenzenesulfonic acid to give reactive dyes which dye cotton in clear blue shades.

Preparation

6,8-Bis(phenylamino)naphthalene-1-sulfonic acid?and 4,4′-Diamino-3′-methyldiphenylamine-2-sulfonic acid?condensation, its product to (add) ammonia of cuprous oxide as the catalyst for air oxidation.

Properties and Applications

blue. Soluble in water for chrysanthemum blue, soluble in ethanol is pure blue. The strong sulfuric acid for green, diluted into red purple. Add sodium hydroxide in aqueous solution is a deep red, and accompanied by precipitation.