Preparation
3,3′-Dimethoxylbenzidine double nitriding, first and 4,6-Dihydroxynaphthalene-1-sulfonic acid, coupled with again diazo, and 4-Methylbenzene-1,3-diamine coupling.
Properties and Applications
blue purple. For purple soluble in water, soluble in ethanol is a deep red. The strong sulfuric acid for blue, blue after diluted precipitation. The dye solution to join strong hydrochloric acid is light blue; With sodium hydroxide in red.
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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3-4
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1
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3-4
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3
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