dye|World dye variety

Name:C.I.Vat Black 1,C.I.73670

Molecular Structure: Thioindigo class

C.I.Vat Black 1,C.I.73670,CAS 3687-67-0,442.71,C20H9BrClNO2S,Vat Black BL

Molecular Formula:C₂₀H₉BrClNO₂S

Molecular Weight: 442.71

CAS Registry Number:3687-67-0

Manufacturing Methods : 9-Chloronaphtho[1,2-b]thiophen-3(2H)-one with 5-Bromo-2-chloro-3H-indol-3-one condensation.

Properties and Applications:  blue light grey to blue black. Black powder. Not soluble in organic solvent. In concentrated sulfuric acid for olive, dilution after black precipitation; In concentrated nitric acid for black. Alkaline reduction leuco for gold; Acid reduction leuco for pale yellow. Mainly used for cotton fabric printing, also can be used for silk and wool dyeing. When dyed cotton commonly used in dyeing light color; When printing is suitable for direct printing, dyeing of wool when good affinity.

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Vat Black BL