Preparation
6-Aminonaphthalene-1-sulfonic acid diazo, and 8-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling, again diazo, and 7-(4-Aminobenzamido)-4-hydroxynaphthalene-2-sulfonic acid coupling, and then hydrolysis ethyl ester base.
Properties and Applications
blue light green. Soluble in water for dark, slightly soluble in alcohol. The strong sulfuric acid as dark blue in green, for purple diluted. The dye solution to join strong hydrochloric acid have precipitation of dark; Add thick sodium hydroxide solution have blue-ray 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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AATCC
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3
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4-5
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4-5
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4-5
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4
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![1-Naphthalenesulfonic acid, 6-[[4-[[6-[(4-aminobenzoyl)amino]-1-hydroxy-3-sulfo-2-naphthalenyl]azo]-8-hydroxy-6-sulfo-1-naphthalenyl]azo]-, trisodium salt Structure](https://www.chemicalbook.com/CAS/20200331/GIF/5938-86-3.gif)