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HomeProduct name listDirect Blue 111

Direct Blue 111

What is Direct Blue 111?

Preparation

8-Amino-5-nitronaphthalene-2-sulfonic acid and 5-Amino-8-nitronaphthalene-2-sulfonic acid?diazo, and 2-Amino-4-methylanisole coupling, product to diazo, and 4-Hydroxynaphthalene-1-sulfonic acid coupling, and then will the nitro reductive into amino.

Properties and Applications

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

Standard Acid Resistance Alkali Resistance Light Fastness Soaping Water
Fading Stain Fading Stain
ISO 5 4 5 3-4 3-4

Safety information for Direct Blue 111

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