Preparation
4-(4-Aminophenyl)benzenamine double nitriding, first in acid conditions and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid?coupling, and then in alkaline conditions and 7-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling.
Properties and Applications
dark red light purple. Soluble in water for wine red, and adequate soluble in alcohol for product red. In the dark for the strong sulfuric acid, diluted Red sauce for.
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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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1
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5
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3
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1-2
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2
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