Preparation
2-Amino-5-methylbenzenesulfonic 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
red light purple. Soluble in water and ethanol, slightly soluble in acetone. The strong sulfuric acid for blue-ray green; In strong hydrochloric acid in insoluble; In insurance for brown powder in light purple.
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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4-5
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4
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4
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1-2
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1-2
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