Preparation
4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid?diazo, and ?8-Aminonaphthalene-1-sulfonic acid? coupling.
Properties and Applications
red light blue. Dark even powder. Soluble in water (purple) and soluble fiber element, slightly soluble in ethanol (red light blue), insoluble in other organic solvents. Meet strong sulfuric acid in deep dark, it will be diluted to appear blue; Nitric acid in a Purple dark reddish brown change after the orange. Its water solution meet strong hydrochloric acid is blue, in thick red orange brown in sodium hydroxide solution. Can dyeing wool, silk, viscose, leather, paper and soap.
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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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5
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1
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3
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2
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1
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2
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3-4
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1
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AATCC
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4
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2
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2
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4
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4
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4
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1
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1
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