Preparation
4-Aminobenzenesulfonic acid diazo, in acid conditions and 4-Amino-5-hydroxynaphthalene-1-sulfonic acid coupling, and then Naphthalen-1-amine diazo in alkaline conditions, and single accidentally coupled nitrogen compounds.
Properties and Applications
red light black. Soluble in water for dark, slightly soluble in alcohol. The strong sulfuric acid for blue, dilute appears after the granular blue precipitation. In water solution to join hydrochloric acid for blue light green, spare part will precipitate out; Add thick sodium hydroxide solution to blue. Suitable for wool, polyamide fiber dyeing and printing.
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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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5-6
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3
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2-3
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2
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