Preparation
4-(4-Aminophenyl)benzenamine double nitriding, And 4-Hydroxynaphthalene-1-sulfonic acid and in acetic acid medium, and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid? coupling.
Properties and Applications
purple. Soluble in water for red light purple, soluble in alcohol. In the strong sulfuric acid as dark blue, diluted red for sauce. The dye solution to join strong hydrochloric acid for dark purple; Add thick sodium hydroxide solution for red wine.
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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3
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4-5
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2
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2-3
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2-3
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