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
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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