Preparation
4-(4-Aminophenyl)benzenamine double nitriding, in alkaline conditions in turn and 7-Amino-4-hydroxynaphthalene-2-sulfonic acid and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acidcoupling.
Properties and Applications
dark red light blue and red light navy. Soluble in water, slightly soluble in ethanol and acetone. The strong sulfuric acid for blue; In nitric acid for gray.
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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5
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3
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2
|
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2
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