Preparation
(a)?3,4,5-Trihydroxy-N-phenylbenzamide and 3,4,5-Trihydroxybenzoic acid or its derivatives (DE80434) reaction; (b)3,4,5-Trihydroxybenzamide (DE 118393) sulfonamide technology and oxidation.
Properties and Applications
dark blue purple. Soluble in water is blue; In concentrated sulfuric acid for purple; After dilution for red light purple to wine red, adding sodium hydroxide in aqueous solution is purple.
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Standard(cotton)
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Ironing Fastness
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Light Fastness
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Fulling
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Persperation Fastness
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Soaping
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Water
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Alkali
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Acid
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ISO
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4-5
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4(40℃)3(100℃)
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