Preparation
2-Aminobenzene-1,4-disulfonic acid diazo, and Naphthalen-1-amine coupling, again diazo, and 8-Aminonaphthalene-2-sulfonic acid coupling, product to diazo, in alkaline conditions and 4-Amino-5-hydroxynaphthalene-1-sulfonic acid coupling, and then diazo, and 4-Nitrobenzene-1,3-diamine coupling.
Properties and Applications
green light grey. water-soluble ash light black, soluble in ethanol. The strong sulfuric acid for gray light black, grey brown for purple diluted. Dye with strong hydrochloric acid solution for violet black, precipitation; Add thick sodium hydroxide solution for Gray light black, precipitation.
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Standard
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Acid Resistance
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Alkali Resistance
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Light Fastness
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Soaping
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Water
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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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5
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4
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5
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2
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2-3
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