Preparation
3-Amino-4-methyl-3′-carboxy-4′-hydroxybenzanilide?diazotization, and 2-Naphthol-5,7-disulfonic acid?coupling.
Properties and Applications
red orange. Soluble in water for golden orange, right amount soluble in ethanol to golden brown. In concentrated sulfuric acid for golden orange, orange for gold after diluted. Dye aqueous solution to join concentrated hydrochloric acid for orange; Join concentrated sodium hydroxide solution for brown light orange.
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Standard
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Ironing Fastness
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Light Fastness
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Fulling
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Persperation Fastness
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Soaping
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Water
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Alkali
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Acid
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ISO
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2-3
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1-2
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3
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3
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4
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5
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![2-Hydroxy-5-[[3-[(2-hydroxy-5,7-disulfo-1-naphtyl)azo]-4-methylphenyl]carbonylamino]benzoic acid trisodium salt Structure](https://www.chemicalbook.com/CAS/GIF/5863-94-5.gif)