Preparation
2-Aminobenzenesulfonic acid diazo, with Diphenylamine?coupling, and then will be preparing sulphonated products.
Properties and Applications
red light yellow. Soluble in water yellow, not soluble in alcohol. The strong sulfuric acid for blu-ray in red, red for the product after diluted. Its water solution with hydrochloric acid into purple; Add sodium hydroxide discoloration. Used as indicator (pH range 7.4 8.6).
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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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4
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3
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