Preparation
2-Amino-4-nitrophenol diazo, and 4-Amino-5-hydroxynaphthalene-1,3-disulfonic acid?coupling, then use copper sulfate processing, make its formation copper complex,
Properties and Applications
red light navy blue. Soluble in water for red light purple, hardly soluble in alcohol. The strong sulfuric acid to red light purple, diluted into product red. In water solution to join strong hydrochloric acid for ruby red; Add thick sodium hydroxide solution for purple.
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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6-7
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3
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3
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2
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1
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2
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