Preparation
2-Amino-3,5-dichlorobenzenesulfonic acid?diazo, and m-Toluidine
coupling, and then a sulfonic acid hydrolysis off base, again diazo, and 7-(3-(4-Acetamidophenyl)ureido)-4-hydroxynaphthalene-2-sulfonic acid coupling.
Properties and Applications
blue-ray red. Soluble in water for product red to blue light red, soluble in ethanol in red. In the strong sulfuric acid as dark blue, diluted red for blue-ray. The dye solution to join strong hydrochloric acid have purplish red precipitate; Add sodium hydroxide solution have strong purplish red precipitate.
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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5-6
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2
|
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1-2
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