Preparation
4-Aminophenol diazotization, with Benzene-1,2,3-triol coupling.
Properties and Applications
red light brown. Slightly soluble in water for green light yellow, slightly soluble in ethanol for green yellow. In concentrated sulfuric acid for yellow brown, dilution after orange brown. Dye aqueous solution to join concentrated hydrochloric acid for orange, add people concentrated sodium hydroxide solution for red orange brown.
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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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3-4
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3
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3
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2
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4
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3-4
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5
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![1,2,3-Benzenetriol, 4-[(4-hydroxyphenyl)azo]- Structure](https://www.chemicalbook.com/CAS/20180601/GIF/6370-38-3.gif)