Vat Blue 48
Vat Blue 48 Basic information
- Product Name:
- Vat Blue 48
- Synonyms:
-
- Vat Blue 48
- 4,4',5,5',7,7'-Hexabromo-Δ2,2'(3H,3'H)-bi[1H-indole]-3,3'-dione
- C.I.73075
- C.I.Vat Blue 48
- Indigo MLB/6B
- 4,5,7,4',5',7'-hexabromo-1H,1'H-[2,2']biindolylidene-3,3'-dione
- 4,5,7-Tribromo-2-(4,5,7-tribromo-3-oxo-1,3-dihydro-2H-indol-2-yli dene)-1,2-dihydro-3H-indol-3-one
- 3H-Indol-3-one, 4,5,7-tribromo-1,2-dihydro-2-(4,5,7-tribromo-1,3-dihydro-3-oxo-2H-indol-2-ylidene)-
- CAS:
- 6417-56-7
- MF:
- C16H4Br6N2O2
- MW:
- 735.64
- Mol File:
- 6417-56-7.mol
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Vat Blue 48 Usage And Synthesis
Preparation
(a) 3H-indol-3-one,2-(1,3-dihydro-3-oxo-2H-indol-2-ylidene)-1,2-dihydro- in chlorosulfonic acid bromide, (b) Indigo under pressure to use too much bromide bromide (With or without an inert solvent may be), its product bromide (mainly seven bromide Indigo) using bisulphite processing, remove unstable (mainly “type” bromide) bromide (GP 236902).
Properties and Applications
blue. Insoluble in Etanol. In concentrated sulfuric acid for blue, dilution after blue precipitation; In the basic insurance powder solution for yellow; In the acidic insurance powder solution for pale yellow. Dye aqueous solution with sodium hydroxide don’t change color.
| Standard | Ironing Fastness | Chlorine bleach | Light Fastness | Mercerized | Oxygen bleach | Soaping | |
| Fading | Stain | ||||||
| ISO | 5 | 3 | 4 | 2 | 2-3 | ||
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