Preparation
2-Amino-4-nitrophenol diazotization, and 4-(3-Methyl-5-oxo-4,5-dihydropyrazol-1-yl)benzenesulfonic acid coupling.
Properties and Applications
dark red light orange. Soluble in water for yellow orange. In concentrated sulfuric acid to yellow, to orange after diluted solution, have yellow precipitation; In concentrated sodium hydroxide solution for orange. Mainly used in color matching for top, wool, leather and nylon dyeing, has higher dyeing fastness.
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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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5
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7
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4
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5
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4-5
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5
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