5-Bromothiophene-2-aldehyde
5-Bromo-2-thiophenecarboxaldehyde
CAS: 4701-17-1
Molecular Formula: C5H3BrOS
5-Bromothiophene-2-aldehyde - Names and Identifiers
5-Bromothiophene-2-aldehyde - Physico-chemical Properties
| Molecular Formula | C5H3BrOS |
| Molar Mass | 191.05 |
| Density | 1.607g/mLat 25°C(lit.) |
| Melting Point | 55°C |
| Boling Point | 105-107°C11mm Hg(lit.) |
| Flash Point | 210°F |
| Solubility | Soluble in chloroform and methanol. |
| Vapor Presure | 0.065mmHg at 25°C |
| Appearance | Liquid |
| Color | Clear yellow to brown |
| BRN | 108404 |
| Storage Condition | 2-8°C |
| Sensitive | Air Sensitive |
| Refractive Index | n20/D 1.637(lit.) |
| MDL | MFCD00005432 |
| Physical and Chemical Properties | Boiling point 105-107 ° C 11mm Hg(lit.) density 1.607g/mL at 25°C(lit.) refractive index n20/D 1.637(lit.) flash point 210 °F storage conditions 0-6°C Sensitive Air BRN 108404 |
| Use | Usually used to prepare 5-[18F]fluoro-2-2-thiophene carboxaldehyde. |
5-Bromothiophene-2-aldehyde - Risk and Safety
| Risk Codes | R36/37/38 - Irritating to eyes, respiratory system and skin. R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. |
| Safety Description | S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S22 - Do not breathe dust. S36 - Wear suitable protective clothing. |
| WGK Germany | 3 |
| TSCA | N |
| HS Code | 29349990 |
| Hazard Note | Irritant/Air Sensitive |
5-Bromothiophene-2-aldehyde - Reference Information
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| production method | 95.5g(0.33mol) of tribromide oxyphosphate was added to a reaction bottle containing 45g(0.32mol)N-methylformaniline and 32.6g(0.2mol) 2-bromothiophene (carried out in a fume hood). At this time, a violent reaction occurs and cooling to reduce the rate of hydrogen bromide production. Then put it on a steam bath and heat it for 1h. After cooling, it is neutralized in an aqueous solution of sodium acetate. Steam distillation, the distillate is extracted with ether, the ether extract is washed with 6mol/L hydrochloric acid and 5% sodium bicarbonate, and then dried with anhydrous sodium sulfate. Distilled to obtain 20.5 g5-bromo-2-thiophene formaldehyde with a boiling point of 80~83 ℃(267Pa). |
Last Update：2024-04-09 21:04:16
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