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Vat Black 2

Name:C.I.Vat Black 2,C.I.73830

Molecular Structure: Carbazole class

C.I.Vat Black 2,C.I.73830,CAS 6369-47-7,376.41,C25H16N2O2

C.I.Vat Black 2,C.I.73830,CAS 6369-47-7,376.41,C25H16N2O2

Molecular Formula:C25H16N2O2

Molecular Weight: 376.41

CAS Registry Number:6369-47-7

Manufacturing Methods : 10-Methyl-11H-benzo[a]carbazole-3,4-dione with 2-Phenylimino-3-indolinone in Acetic anhydride – formic acid solution condensation.

Properties and Applications: blue light grey to blue black. Black powder. In concentrated sulfuric acid to black, dilute is blue-black; In the basic insurance powder solution for green yellow; In the acidic insurance powder solution for pale yellow. Dye cellulose fibre for blue ash or blue black. Used for cotton fabric direct dyeing, reserving, coloring discharge.

Standard Ironing Fastness Chlorine bleach Light Fastness Mercerized Oxygen bleach Soaping
Fading Stain
ISO 4 4 4-5 3 3

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3 Responses to “Vat Black 2”

  1. […] C.I.Vat Black 2 […]

  2. […] Methods : (a) in the presence of Pyridine , with Chlorosulfonic acid treatment  C.I. Vat Black 2 leuco; (b) in the Pyridine with metal (such as copper, iron, zinc, etc) and Sulfur trioxide source […]

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