| Identification | Back Directory | [Name]
5-bromo-2-(5-bromo-4-chloro-1,3-dihydro-3-oxo-2H-indol-2-ylidene)-4-chloro-1,2-dihydro-3H-indol-3-one | [CAS]
29245-44-1 | [Synonyms]
C.I.73045
Vat Blue 2
C.I.Vat Blue 2
BASF Brilliant Indigo 4G-D
BASF Brilliant Indigo 4G-N
4,4'-Dichloro-5,5'-dibromo-Δ2,2'-biindoline-3,3'-dione
5,5'-Dibromo-4,4'-dichloro-Δ2,2'(3H,3'H)-bi[1H-indole]-3,3'-dione
5-bromo-2-(5-bromo-4-chloro-3-oxo-1H-indol-2-ylidene)-4-chloro-1H-indol-3-one
5-bromo-2-(5-bromo-4-chloro-1,3-dihydro-3-oxo-2H-indol-2-ylidene)-4-chloro-1,2-dihydro-3H-indol-3-one | [EINECS(EC#)]
249-533-2 | [Molecular Formula]
C16H6Br2Cl2N2O2 | [MDL Number]
MFCD28975796 | [MOL File]
29245-44-1.mol | [Molecular Weight]
488.95 |
| Chemical Properties | Back Directory | [Boiling point ]
556.3±50.0 °C(Predicted) | [density ]
2.026±0.06 g/cm3(Predicted) | [form ]
Solid | [pka]
-6.23±0.20(Predicted) | [color ]
Dark purple to black |
| Hazard Information | Back Directory | [Uses]
Vat Blue 2, a indigo (HY-N0335) derivative, is a dark blue 5,5'-dibromo-4,4'-dichloroindigo dye[1]. | [Preparation]
(a) in the Chloroacetic acid or methyl bromide in sulfate Janson 3H-indol-3-one,2-(1,3-dihydro-3-oxo-2H-indol-2-ylidene)-1,2-dihydro- (namely VAT dye C.I. 73025) [FIAT 764 and 1313], or in the cold sulfuric acid in?3H-indol-3-one,2-(1,3-dihydro-3-oxo-2H-indol-2-ylidene)-1,2-dihydro- (GP 23496 l); (b) 3-Bromo-6-(carboxymethylamino)-2-chlorobenzoic acid?and Sodium methanolate reaction, product with Potassium hydroxide treatment, and air oxidation (USP 957683). Note: C.I. 73025 chemical structure as above. | [Properties and Applications]
green light blue. Soluble in Xylene is blue. In concentrated sulfuric acid to green light blue, dilution after blue floc precipitation; In the basic insurance powder solution for yellow brown; In the acidic insurance powder solution for colorless.
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Standard
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Ironing Fastness
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Chlorine bleach
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Light Fastness
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Mercerized
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Oxygen bleach
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Soaping
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Fading
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Stain
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ISO
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4-5
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3
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3-4
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3
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2-3
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| [References]
[1] Judy D. Timpa, et al. The Flammability of Cotton Fabrics Dyed with Indigo Dyes. |
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