1899-24-7
5-Bromo-2-furaldehyde
CAS: 1899-24-7
Molecular Formula: C5H3BrO2
1899-24-7 - Names and Identifiers
1899-24-7 - Physico-chemical Properties
| Molecular Formula | C5H3BrO2 |
| Molar Mass | 174.98 |
| Density | 1.5940 (rough estimate) |
| Melting Point | 82-85 °C (lit.) |
| Boling Point | 112 °C/16 mmHg (lit.) |
| Flash Point | 112°C/6mm |
| Solubility | Chloroform, Methanol |
| Vapor Presure | 0.099mmHg at 25°C |
| Appearance | Bright yellow powder |
| Color | Slightly yellow |
| BRN | 108403 |
| Storage Condition | 2-8°C |
| Stability | Stable. Incompatible with strong oxidizing agents. |
| Sensitive | Air Sensitive |
| Refractive Index | 1.4450 (estimate) |
| MDL | MFCD00159501 |
| Physical and Chemical Properties | Storage Conditions: Refrigerator sensitivity: Air Sensitive WGK Germany:3 |
1899-24-7 - Risk and Safety
| Risk Codes | R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. R36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. |
| WGK Germany | 3 |
| HS Code | 29130000 |
| Hazard Note | Harmful |
| Hazard Class | IRRITANT |
1899-24-7 - Reference Information
| introduction | in recent years, the application of 5-bromo-2-furanformaldehyde in antiviral drugs, antiparasitic drugs, antimalarial drugs, anticancer drugs and anticancer drugs has gradually increased, thus significantly increasing its economic value and attracting widespread attention. |
| properties | 5-bromo -2-furaldehyde is a yellowish powder with a melting point of 80-85 ℃, a boiling point of 222.8 ℃/760mmHg, a flash point of 112 ℃/6mmHg, a density ρ = 1.748g/cm3, and can be dissolved in organic solvents such as carbon dichloride, carbon tetrachloride, ether, etc. |
| application | furaldehyde is an important basic chemical raw material, and there are more than 1600 kinds of chemical products directly or indirectly derived from furaldehyde. 5-bromo-2-furaldehyde is an important furaldehyde deep processing product, is an important organic synthesis intermediate compound, widely used in medicine, pesticides, dyes, polymer materials and other fields. |
| preparation | 1,2-dichloroethane (240 ml) was added to a 2000 ml two-mouth round bottom flask, then furfural (49.6 ml, 600 mmol), hydroquinone (0.6g, 5.2 mmol) and sulfur powder (0.168g, 5.2 mmol) were added sequentially. 1,2-dichloroethane (300 ml) and liquid bromine (36.8 ml, 680 mmol) were added to a constant pressure funnel. After the mixture of the reaction bottle is heated to reflux, the bromine solution of 1,2-dichloroethane is slowly added to the reaction bottle (1-3 hours), and the reaction mixture is heated and stirred for 20 hours. After the reaction, cool to room temperature, filter, the filtrate is neutralized with saturated sodium bicarbonate solution to pH = 8, and the organic phase is separated. The aqueous phase is extracted with dichloromethane (3 × 75ml), and the organic phase is combined with anhydrous sodium sulfate. dry. Rotating evaporation removes the solvent to obtain a black oil, which is added to a 1:1 solution of water and ethanol and stirred and placed to obtain 37.73g of orange needle crystal 5-bromo-2-furanformaldehyde. |
Last Update：2024-04-09 20:52:54
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