Preparation
2,4-Dimethylbenzenamine diazo, coupled with 4-Hydroxynaphthalene-2,7-disulfonic acid.
Properties and Applications
colourful red yellow light. Soluble in water for product red, slightly soluble in ethanol for orange, almost insoluble in acetone. The strong sulfuric acid for product red, diluted for pink. In water solution to join strong hydrochloric acid for product red; By adding concentrated sodium hydroxide solution was time
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Standard
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Light Fastness
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Soaping
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Persperation Fastness
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Oxygen bleaching
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Fastness to seawater
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Fading
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Stain
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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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2-3
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2-3
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2-3
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3
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2
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