Preparation
3-Aminonaphthalene-1,5-disulfonic acid diazo, and 2,5-Dimethylbenzenamine?coupling, its product to diazo, in alkaline conditions and 4-Hydroxy-7-(phenylamino)naphthalene-2-sulfonic acid coupling.
Properties and Applications
bright purple. Soluble in water for red light purple, and adequate soluble in alcohol for product red to blue light purple. The strong sulfuric acid for Tracy in blue. The dye solution to join strong hydrochloric acid for purple, have precipitation; Add sodium hydroxide solution have strong purplish red precipitate.
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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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3
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4
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2
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1-2
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1-2
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![3-[[2,5-Dimethyl-4-[(1-hydroxy-6-phenylamino-3-sodiosulfo-2-naphthalenyl)azo]phenyl]azo]naphthalene-1,5-disulfonic acid disodium salt Structure](https://www.chemicalbook.com/CAS/GIF/6227-11-8.gif)