Preparation
2,5-Dichlorobenzenamine diazo, in acid conditions and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid?coupling, 4-(4-Aminophenyl)benzenamine double nitriding, first in alkaline conditions and formation of accidentally nitrogen compounds and then in alkaline conditions and 3-Hydroxynaphthalene-2,7-disulfonic acid coupling.
Properties and Applications
navy blue light to dark. Soluble in water to blue. The strong sulfuric acid in blue, purple and blue after diluted precipitation.
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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4
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2
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2-3
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