Preparation
4-(4-Aminophenyl)benzenamine double nitriding, first and (in bicarbonate media) 6-Amino-4-hydroxynaphthalene-2-sulfonic acid?coupling, and then and 4-Aminobenzenesulfonic acid diazo, and 4-Methylbenzene-1,3-diamine coupled to a product matches.
Properties and Applications
red light brown. Soluble in water for red light brown. In the dark for the strong sulfuric acid, diluted to red orange brown. The dye solution to join strong hydrochloric acid have red light brown precipitation; Add thick sodium hydroxide solution for red light orange brown.
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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3
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2-3
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3
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