3-Bromo-2-methylpropene
ALDRICH/345830 - 97%
Synonym: Methallyl bromide; Methylallyl bromide
CAS Number: 1458-98-6
Empirical Formula (Hill Notation): C4H7Br
Molecular Weight: 135.00
MDL Number: MFCD00134155
Linear Formula: H2C=C(CH3)CH2Br
Product Type: Chemical
| assay | 97% |
| bp | 94-95 °C (lit.) |
| density | 1.339 g/mL at 25 °C (lit.) |
| form | liquid |
| functional group | alkyl halide |
| bromo | |
| impurities | 0.1% hydroquinone |
| InChI | 1S/C4H7Br/c1-4(2)3-5/h1,3 |
| InChI key | USEGQJLHQSTGHW-UHFFFAOYSA |
| Quality Level | 100 ![]() |
| refractive index | n |
| SMILES string | CC(=C)CBr |
| storage temp. | 2-8°C |
| Application: | 3-Bromo-2-methylpropene may be used: • in the synthesis of alkenyl imines • in the synthesis of 2-methylpropenyl (“methallyl”) complex, Cp*Os(η3-allyl)Br2 • in a study of chiral phase transfer alkylation leading to (S)-α-alkylcysteines |
| General description: | Rotational isomerism in 3-bromo-2-methylpropene has been studied by IR spectroscopy. |
| Packaging: | 5, 25 mL in glass bottle |
| Symbol | ![]() ![]() ![]() GHS02,GHS05,GHS07,GHS09 |
| Signal word | Danger |
| Hazard statements | H225 - H302 + H332 - H314 - H411 |
| Precautionary statements | P210 - P273 - P280 - P305 + P351 + P338 - P310 |
| Hazard Codes | F,C,N |
| Risk Statements | 11-20/22-34-51/53 |
| Safety Statements | 9-16-26-29-36/37/39-45-61 |
| RIDADR | UN 2924 8(3) / PGII |
| WGK Germany | WGK 3 |
| Flash Point(F) | 44.6 °F - closed cup |
| Flash Point(C) | 7 °C - closed cup |
| Purity | 97% |
| bp | 94-95 °C (lit.) |
| Density | 1.339 g/mL at 25 °C (lit.) |
| Refractive Index | n |
| Storage Temp. | 2-8°C |
| UNSPSC | 12352100 |





