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C.I. Vat Blue 42

C.I. Vat Blue 42 structure

CAS No:
1327-81-7
Chemical Name:
C.I. Vat Blue 42
Synonyms:
C.I. Vat Blue 42;C.I. 53640;Hidrotin Blue G;Hydron Blue G;Kayaku Carbanol Blue GX F.S.;Kayaku Carbanol Blue GX;Mikeran Blue GX;Redon Blue G;Sodyeco Vat Blue GD;Sodyeco Vat Blue GDP;Sodyeco Vat Blue GL;Sodyeco Vat Blue GP;Tinaldene Blue G;Phenol,4-[(9-ethyl-9H-carbazol-3-yl)amino]-,reaction products with sodium sulfide (Na2(Sx));59978-73-3
Categories:
Dyes and Pigments > Dye

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C.I. Vat Blue 42 Basic Attributes

EC Number：

215-500-6

C.I. Vat Blue 42 Use and Manufacturing

Methods of Manufacturing

sing 9-ethylcarbazole and p-nitrosophenol as raw materials, the two are first condensed in the presence of concentrated sulfuric acid at -23°C, reduced, and then refluxed with sodium polysulfide in a butanol medium to remove the butane After alcohol, oxidized, filtered, dried and crushed to obtain finished products. . Ethylcarbazole sulfate is obtained by melting 0.4mol ethylcarbazole and 325mL concentrated sulfuric acid at 70°C. Dissolve 0.41mol p-nitrosophenol and 325mL concentrated sulfuric acid at 10°C to obtain a nitrosophenol sulfuric acid solution. The ethylcarbazole sulfate and nitrosophenol sulfuric acid solution were reduced for 6h at -20°C, filtered to remove iron slag, and dried to obtain reduced leuco (I). Heat 200 mL of butanol, sodium sulfide, sulfur, and leuco body (I) together to 110°C and reflux for 24 hours, then add 4 g of sodium nitrite (95%), and continue to reflux for 2 hours. Steaming butanol, desulfurization, air oxidation, and drying to obtain products.

Uses

Sulfur-reduced blue GNX is mainly used for dyeing cotton, hemp, viscose fiber and Victoria cotton blended fabrics. It is also used for dyeing various blues with slightly greenish shade.

Material

Sulfuric acid