Preparation
p-Methylaniline (2 Moore) and sulfur (4.5 atomic ratio) in 200 ~ 280 ℃ heat, Sulfonated with fuming sulfuric acid alkali obtained primulin. Its product (C.I. Direct Yellow 59, C.I. 49000) diazo, and 4-Methylbenzene-1,3-diamine coupling.
Properties and Applications
red light brown. Soluble in water and ethanol for orange brown. The strong sulfuric acid for orange red + wine red, for yellow brown after diluted. The dye solution to join strong hydrochloric acid with brown precipitation; With strong sodium hydroxide solution have orange brown 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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5
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5
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2-3
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1-2
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2
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![[2,6'-Bibenzothiazole]-7-sulfonic acid, 2'-[4-[(2,4-diamino-5-methylphenyl)azo]phenyl]-6-methyl-, monosodium salt Structure](https://www.chemicalbook.com/CAS/20200331/GIF/10214-08-1.gif)