Vat Black 8
- CAS NO.：2278-50-4
- Empirical Formula: C45H19N3O4
- Molecular Weight: 665.66
- MDL number: MFCD01939424
- EINECS: 218-906-1
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-08-28 09:47:36
What is Vat Black 8?
Preparation
3,9-Dibromo-7H-benzo[de]anthracen-7-one, 3H-naphtho[2,3-f]indazol-3-one and 1-Aminoanthracene-9,10-dione in Potassium hydroxide under the existence of condensation, closed loop.
Safety Profile
Mildly toxic by intraperitoneal and ingestion routes. An eye irritant.When heated to decomposition it emits toxic fumes of NOx.
Properties and Applications
blue light grey. Black powder. Insoluble in water, Acetone, Etanol, Toluene and Chloroform, slightly soluble in 2 – Chlorophenol, Pyridine . In concentrated sulfuric acid to have yellow green: alkaline reduction leuco for blue light green; Acid reduction leuco for red brown: mainly used in the cotton fabric jig dyeing, dyeing and suspended pad dyeing, also used for Fiber/cotton, polyester-cotton blended fabric two bath set of dye dyeing. Suitable for suspension pad dyeing deep, shallow gray, and can spell dye all kinds of noise. Its main leuco dye yarn, can also be used to viscose and silk dyeing.
| Standard | Ironing Fastness | Chlorine bleach | Light Fastness | Mercerized | Oxygen bleach | Soaping | |
| Fading | Stain | ||||||
| ISO | 4 | 4-5 | 7 | 4 | 5 | 4 | 5 |
Properties of Vat Black 8
| Boiling point: | 685.55°C (rough estimate) |
| Density | 1.2394 (rough estimate) |
| refractive index | 1.7790 (estimate) |
| pka | 13.18±0.20(Predicted) |
| EPA Substance Registry System | 1H-Benz[6,7]indazolo[2,3,4-fgh]naphth[2'',3'':6',7']indolo[3',2':5,6]anthra[2,1,9-mna]acridine-2,7,10,15-tetrone (2278-50-4) |
Safety information for Vat Black 8
Computed Descriptors for Vat Black 8
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