Preparation
(a) 3,5-Diamino-4-chlorobenzenesulfboic acid double nitrogen, add people sodium hydroxide make show alkaline, so that the molecular of chlorine is hydroxyl replaced, then and Naphthalen-2-ol (2 Moore) coupling; (b)3,5-Diamino-4-hydroxybenzenesulfonic acid?double nitrogen, and Naphthalen-2-ol (2 Moore) coupling
Properties and Applications
dark blue black. Soluble in water for skipper, slightly soluble in alcohol. In concentrated sulfuric acid for purple to red light blue, blue light red precipitation after dilution. Dye aqueous solution to join concentrated hydrochloric acid for cherry red, with red precipitation; Join concentrated sodium hydroxide solution for red light purple, and accompanied by black precipitation; Add 10% sodium hydroxide solution for blue.
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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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AATCC
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4
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4-5
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4-5
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4
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