Preparation
2-Amino-5-nitrobenzenesulfonic acid diazo, in acid conditions and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid acid matches, will the nitro reduction, again diazo, in acid conditions and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid acid coupling
Properties and Applications
green light blue. Soluble in water for blue, not soluble in alcohol. The strong sulfuric acid as dark blue in green, diluted red for purple, have precipitation; In nitric acid for dark red. The dye solution to join strong hydrochloric acid has the purple precipitation; Add sodium hydroxide solution for red light purple.
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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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4
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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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