Vat Blue 34
Name:C.I.Vat Blue 34,C.I.73055
Molecular Structure: Indigo class
C.I.Vat Blue 34,C.I.73055,CAS 6492-73-5,341.16,C16H9BrN2O2
Molecular Formula:C16H9BrN2O2
Molecular Weight: 341.16
CAS Registry Number:6492-73-5
Manufacturing Methods : (a) 3H-indol-3-one,2-(1,3-dihydro-3-oxo-2H-indol-2-ylidene)-1,2-dihydro- in a sulphuric 1-Amino-4-bromo-9,10-dioxo-9,10-dihydroanthracene-2-sulfonic acid (FIAT 764 and 1313); (b) 3H-indol-3-one,2-(1,3-dihydro-3-oxo-2H-indol-2-ylidene)-1,2-dihydro- or 3H-indol-3-one,2-(1,3-dihydro-3-oxo-2H-indol-2-ylidene)-1,2-dihydro- white (C.I. 73001) and bromine in the presence of water response; (c) 3H-indol-3-one,2-(1,3-dihydro-3-oxo-2H-indol-2-ylidene)-1,2-dihydro- and bromine in the presence of Pyridine or starch reaction, or in aqueous hydrogen bromide, hydrogen chloride or the presence of sulfuric acid reaction; (d) 5-Bromo-3-indolinone and 3H-indol-3-one condensation.
Properties and Applications: red light blue to red light navy blue. Insoluble in Etanol, soluble in Toluene is blue.
| Standard | Ironing Fastness | Chlorine bleach | Light Fastness | Mercerized | Oxygen bleach | Soaping | |
| Fading | Stain | ||||||
| ISO | 4 | 2 | 3 | 3 | 3 | ||
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