Preparation
p-Methylaniline (2 Moore) and sulfur (4.5 atomic ratio) in 200 ~ 280 ° C heat, with hair smoke from the sulphonated sulfuric acid alkali primrose spirit. The product diazo, and 6-Hydroxynaphthalene-2-sulfonic acid coupling.
Properties and Applications
yellow light pink to red yellow light. Soluble in water for orange red. The strong sulfuric acid for blood-red, after diluted orange precipitation. The dye solution to join strong hydrochloric acid have orange precipitation; Add thick dark sodium hydroxide solution.
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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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1-2
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2-3
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1
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![[2,6'-Bibenzothiazole]-7-sulfonic acid, 2'-[4-[(2-hydroxy-6-sulfo-1-naphthalenyl)azo]phenyl]-6-methyl-, disodium salt Structure](https://www.chemicalbook.com/CAS/20200401/GIF/5858-98-0.gif)