Preparation
4-Aminobenzenesulfonic acid diazo, and O-Anisidine coupling, its product to diazo, and 7-Benzamido-4-hydroxynaphthalene-2-sulfonic acid?coupling.
Properties and Applications
red light purple. Soluble in water for red light purple. The strong sulfuric acid for green light blue, dilute after dark purple precipitation. Dye with hydrochloric acid solution is dark red light blue 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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3
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4
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5
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2-3
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3
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![7-Benzoylamino-4-hydroxy-3-[[2-methoxy-4-[(4-sodiosulfophenyl)azo]phenyl]azo]naphthalene-2-sulfonic acid sodium salt Structure](https://www.chemicalbook.com/CAS/GIF/5873-27-8.gif)