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HomeProduct name listDirect Green 22

Direct Green 22

  • Molecular Weight: 0

What is Direct Green 22?

Preparation

4-(4-Aminophenyl)benzenamine double nitriding, first coupled with 2-Hydroxybenzoic acid, And then with 8-Aminonaphthalene-2-sulfonic acid coupling, its product to diazo, and 4,5Dihydroxynaphthalene-1-sulfonic acid ?coupling.

Properties and Applications

dark green to olive green. Soluble in water for olive green, and adequate soluble in ethanol for green light. The strong sulfuric acid for violet black, diluted for Light gray Light green. The dye solution to join strong hydrochloric acid for olive; Add thick sodium hydroxide solution for olive brown.

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

Safety information for Direct Green 22

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