Preparation
4-Nitrobenzenamine diazo, in acid conditions and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid?coupling, 4-Nitrobenzenamine diazo, in alkaline conditions and the synthesis product matches, will be one of the nitro reduction, again diazo, and Benzene-1,3-diamine coupling.
Properties and Applications
black. The strong sulfuric acid for green light gray, brown after dilute the precipitation; In nitric acid solution for brown. The dye solution to join hydrochloric acid solution for dark purple, precipitation; Sodium hydroxide solution to join the same color.
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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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3-4
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5
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3
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2
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3-4
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