Preparation
4-(4-Aminophenyl)benzenamine double nitriding, and 7-Hydroxynaphthalene-1-sulfonic acid coupling, and then in alkaline conditions and 4-Amino-5-hydroxynaphthalene-1-sulfonic acid coupling.
Properties and Applications
red light blue. Soluble in water for violet blue, soluble in alcohol for red light purple. The strong sulfuric acid for blue, purple precipitation after diluted. The dye solution to join hydrochloric acid for blue; Add sodium hydroxide solution for red light 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
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4
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1
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2
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