Preparation
2-Amino-4,6-dinitrophenol diazotization, and Benzene-1,3-diamine coupling.
Properties and Applications
dark red light brown. Soluble in hot water for orange red, soluble in ethanol for red light brown. In concentrated sulfuric acid for brown, dilute almost unchanged; In concentrated nitric acid for brown solution, dilution after amber solution. Dye aqueous solution to join concentrated hydrochloric acid for amber solution; Join concentrated sodium hydroxide solution for 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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4
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5
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5
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1
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5
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4
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5
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![2-[(2,4-diaminophenyl)azo]-4,6-dinitrophenol Structure](https://www.chemicalbook.com/CAS/GIF/6364-36-9.gif)