Preparation
O-Methylaniline diazo, and 5-Aminonaphthalene-2-sulfonic acid?coupling, its product to diazo, in alkaline conditions and 7-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling.
Properties and Applications
dark purple. Soluble in water and ethanol for red light purple. The strong sulfuric acid for Tracy in blue, purple for red after diluted. The dye solution to join strong hydrochloric acid has the purple precipitation; Add thick dark for sodium hydroxide solution.
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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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5
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3
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1-2
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1-2
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![2-Naphthalenesulfonic acid, 7-amino-4-hydroxy-3-[2-[4-[2-(2-methylphenyl)diazenyl]-6-sulfo-1-naphthalenyl]diazenyl]-, sodium salt (1:2) Structure](https://www.chemicalbook.com/CAS/20211123/GIF/6227-01-6.gif)
