Vat Blue 20

Vat blue BO Vat blue 20 Vat dye

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Specification

item	value
CAS No.	116-71-2
MF	C34H16O2
EINECS No.	204-152-0
Place of Origin	China
Type	Vat Dye
Usage	Textile Dyestuffs

Chemical property: blue black powder. It is insoluble in water and ethanol, slightly soluble in acetone, chloroform, o-chlorophenol, pyridine and toluene, and soluble in tetrahydronaphthalene and xylene (red with red fluorescence solution). It is purple black in concentrated sulfuric acid, and produces purple black precipitate after dilution. It is dark purple in sodium hydrosulfite alkaline solution and dark red in acid solution.

Application: vat dark blue BO is mainly used for dyeing cotton fiber with good affinity, fast dyeing and moderate levelness. Less for printing, more for color matching. It can be used for the dyeing of silk, viscose fiber, viscose cotton and vinylon cotton, as well as the one bath hot melt dyeing of polyester cotton blended fabrics and disperse dyes, and also for the preparation of organic pigments.

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