Reddish purple powder. Soluble in water and ethanol. Its aqueous solution is bluish red, turns orange-red after adding hydrochloric acid, accompanied by a red precipitate; red after adding sodium hydroxide, with a precipitate. In concentrated sulfuric acid is bluish red, after dilution is red.
Acid violet 90 is used for dyeing wool, silk, and nylon, and for direct printing on wool, silk, and viscose fiber fabrics, but it cannot be used for discharge dyeing. It is also used for leather coloring.
4-Amino-3-hydroxynaphthalene-1-sulfonic acid diazo, and 3-Methyl-1-phenyl-1H-pyrazol-5(4H)-one coupling, and then in water solution and chromium acid were hot, make the generation of the chrome complex.
Flammability and Explosibility
Non flammable
Properties and Applications
blue light pink. The strong sulfuric acid in red for orange, diluted red for yellow; In nitric acid for tan; In strong hydrochloric acid for red, diluted is still red. Apply to wool and polyamide fiber dyeing and printing.
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Standard
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Light Fastness
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Soaping
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Persperation Fastness
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Oxygen bleaching
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Fastness to seawater
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Fading
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Stain
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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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4-5
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5
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2-3
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5
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