Preparation
4-Amino-2,6-naphthalenedisulfonic acid?and 4-Aminonaphthalene-2,7-disulfonic acid diazo, and Naphthalen-1-amine coupling, its product to diazo, and Naphthalen-1-amine coupling.
Properties and Applications
black. Soluble in water and ethanol is a deep red. The strong sulfuric acid in blue or black for ash, after diluted red purple precipitation. In water solution to join strong hydrochloric acid is a deep red; Add thick sodium hydroxide solution for deep red.
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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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3-4
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3-4
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2
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4
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4
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2-3
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3-4
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1-2
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