Preparation
4-Aminonaphthalene-1,6-disulfonic acid diazo, and Naphthalen-1-amine coupling, its product to diazo, in alkaline conditions and 4-Hydroxy-7-(phenylamino)naphthalene-2-sulfonic acid coupling.
Properties and Applications
red light blue. Soluble in water for deep purple, and adequate soluble in alcohol. The strong sulfuric acid as dark blue in green, for purple diluted. The dye solution to join strong hydrochloric acid for red light blue precipitation; Add thick sodium hydroxide solution for red light purple, have 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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ISO
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4
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5
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3
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2
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2
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AATCC
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2
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4
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3
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2
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2
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![1,6-Naphthalenedisulfonic acid, 4-[[4-[[1-hydroxy-6-(phenylamino)-3-sulfo-2-naphthalenyl]azo]-1-naphthalenyl]azo]-, trisodium salt Structure](https://www.chemicalbook.com/CAS/20200331/GIF/6492-60-0.gif)