(2E)-2,3-dibromo-4-oxobut-2-enoate
Mucobromic acid
CAS: 488-11-9
Molecular Formula: C4H2Br2O3
(2E)-2,3-dibromo-4-oxobut-2-enoate - Names and Identifiers
(2E)-2,3-dibromo-4-oxobut-2-enoate - Physico-chemical Properties
| Molecular Formula | C4H2Br2O3 |
| Molar Mass | 257.86 |
| Density | 2.2801 (rough estimate) |
| Melting Point | 120-124 °C (lit.) |
| Boling Point | 321.8±42.0 °C(Predicted) |
| Flash Point | 148.4°C |
| Solubility | methanol: 0.1g/mL, clear |
| Vapor Presure | 5.99E-05mmHg at 25°C |
| Appearance | White crystal |
| Color | White to beige |
| BRN | 1705707 |
| pKa | 0.28±0.44(Predicted) |
| Storage Condition | Inert atmosphere,Room Temperature |
| Refractive Index | 1.4947 (estimate) |
| MDL | MFCD00063745 |
| Physical and Chemical Properties | White orthogonal crystal. Melting point 125 °c. Soluble in water, alcohol. |
| Use | Is an intermediate in organic synthesis |
(2E)-2,3-dibromo-4-oxobut-2-enoate - Risk and Safety
| Risk Codes | R34 - Causes burns R37 - Irritating to the respiratory system |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S27 - Take off immediately all contaminated clothing. |
| UN IDs | UN 3261 8/PG 2 |
| WGK Germany | 3 |
| TSCA | Yes |
| HS Code | 29183000 |
| Hazard Class | 8 |
| Packing Group | III |
(2E)-2,3-dibromo-4-oxobut-2-enoate - Reference Information
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| Use | is an organic synthesis intermediate |
| Production method | Add 2-furanoic acid to water to cool, stir, and add bromine dropwise. The reactants were heated and refluxed for 0.5h. After full cooling, the product is precipitated, filtered, and the filter cake is ground with sodium bisulfite and water before filtering to obtain crude products. The crude product was recrystallized with boiling water and decolorized with activated carbon to obtain pure product 2, 3-dibromo-2-butenal acid. Yield 64-67%. |
Last Update：2024-04-10 22:29:15
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