Vat Yellow 33

Specification

Chemical property: yellow powder. It is brownish red in concentrated sulfuric acid, yellow in sodium hydrosulfite acid solution, and jujube red in sodium hydrosulfite alkaline solution.

Usage: Vat yellow F3GC is used for dyeing cotton fabric, which is bright yellow and light red. It has high directness to cotton fiber and good levelness. It can be used for anti dyeing and discharge printing.

Production method: 4 '- nitro-4-benzoic acid and 1-aminoanthraquinone are used as raw materials. First, 4' - nitro-4-benzoic acid and glucose are reduced under alkaline conditions to obtain an azo compound, then sulfone chloride (SOCl2) is used for acyl chlorination, and finally, the product is obtained by condensation with 1-aminoanthraquinone..

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