Preparation
in reflux conditions, sodium hydroxide solution in (E)-2-(2-sulfo-4-nitrostyryl)-5-nitrobenzenesulfonic acid with 3-Aminobenzenesulfonic acid sodium diazotization and O-Anisidine coupled with heating products.
Properties and Applications
dark red light orange. Soluble in water and ethanol, insoluble in acetone. The strong sulfuric acid as dark blue in green; In the dark of nitric acid blue purple; In strong hydrochloric acid for dark red jujube; In sodium hypochlorite solution for dark red.
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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3-4
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5
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6-7
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4
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3
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