Preparation
4-Amino-3-methylbenzenesulfonic acid diazo, coupled with m-Toluidine, its product to diazo, and 7-Benzamido-4-hydroxynaphthalene-2-sulfonic acid coupling.
Properties and Applications
blue-ray red. Soluble in water and ethanol is cherry red. The strong sulfuric acid for blue-ray green, red after diluted purple precipitation. The dye solution to join strong hydrochloric acid has the purple precipitation; Add thick sodium hydroxide solution has the purple 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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3-4
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5
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1-2
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1-2
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![disodium 7-(benzoylamino)-4-hydroxy-3-[[3-methyl-4-[(2-methyl-4-sulphonatophenyl)azo]phenyl]azo]naphthalene-2-sulphonate Structure](https://www.chemicalbook.com/CAS/GIF/5873-26-7.gif)