Preparation
3,3′-Dimethoxylbenzidine double nitriding, first and 4-Amino-5-hydroxynaphthalene-1,3-disulfonic acidcoupling, and then and Naphthalen-2-ol coupling.
Properties and Applications
blue. Soluble in water for blue, soluble in soluble fiber element, insoluble in organic solvents. The strong sulfuric acid for green light blue, purple precipitation after diluted; In the light of nitric acid for palm gray solution. The dye solution to join for blue-ray red rare hydrochloric acid; Add sodium hydroxide for purple.
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Standard
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Acid Resistance
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Alkali Resistance
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Light Fastness
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Soaping
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Water
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Fading
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Stain
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Fading
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Stain
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ISO
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4-5
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4-5
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1
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1-2
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1-2
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AATCC
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5
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3-4
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1-2
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3-4
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2-3
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