vat brown

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CAS No:2475-33-4 Feature:3#/1#/68#/15# Chemical Properties: Dark brown powder. Insoluble in water, micro-soluble in xylene. In concentrated sulfuric acid in the wine was dark red, reddish brown flocculent diluted produce precipitation. In alkaline hydrosulfite solution was red brown, yellow in acidic solution was brown. Use: Vat Brown R is mainly used for dyeing cotton fibers, dyeing is very good, affinity. Also used for cotton, polyester adhesive, dimensional dyed cotton blended fabric, polyester slight staining. With disperse dye bath melt, but also two-bath dyeing. Brown also with the reduction of G, Vat Brown GG, Vat Brown BR dyessuch as different shades of brown shade, but also for the preparation of organic pigments. Mainly used for cotton and polyester / cotton blended fabric dyeing Production methods: With 1 - bromo -4 - benzoyl-amino-anthraquinone and 1 - amino -5 - benzoyl-amino-anthraquinone as the raw material, first the two anhydrous sodium acetate in the presence of condensation, cyclization with fuming sulfuric acid, after that was the product of oxidation of sodium hypochlorite. After filtering, crushing, drying was finished. Packing: 25kgs/pp bag or at buyer's option Delivery time: two weeks after we recieved the deposit(for 1fcl) Supply: 1000mt/month MOQ: 1mt

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Jinan JuHeng Chemical CO., Ltd.

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