Preparation
4-(4-Aminophenyl)benzenamine double nitriding, first coupled with 2-Hydroxybenzoic acid, and then in acid conditions and 4-Amino-5-hydroxynaphthalene-1,7-disulfonic acid coupling.
Properties and Applications
dark yellow light green. Soluble in water for red light brown, not soluble in alcohol. The strong sulfuric acid in the navy for, for the shallow blue light gray after diluted. Dye with strong hydrochloric acid solution for dark blue light green, precipitation; Add thick sodium hydroxide solution for purplish red color, have precipitation.
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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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4-5
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4
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3-4
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3-4
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4
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