Preparation
3,4′-Disulfo-4-aininoazobenzene diazotization, and 7-[N-methyl-N-(3-carboxy-4-hydroxyphenylfonyl)]amino-1-naphthol-3-sulfonic acid?coupling.
Properties and Applications
blue light red. Soluble in water for red, slightly soluble in ethanol for magenta. In concentrated sulfuric acid for blue, red after diluted. Dye aqueous solution to join concentrated hydrochloric acid to red; Join concentrated sodium hydroxide solution for purple.
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Standard(cotton)
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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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4
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