Bromine
ALDRICH/470864 - ≥99.99% trace metals basis
Synonym: Dibromine
CAS Number: 7726-95-6
Empirical Formula (Hill Notation): Br2
Molecular Weight: 159.81
EC Number: 231-778-1
MDL Number: MFCD00010896
Linear Formula: Br2
Product Type: Chemical
| anion traces | chloride (Cl-): ≤0.05% |
| assay | ≥99.5% (by Na2S2O3, titration) |
| ≥99.99% trace metals basis | |
| bp | 58.8 °C (lit.) |
| cation traces | heavy metals: ≤2 ppm |
| Ni: ≤5 ppm | |
| density | 3.119 g/mL at 25 °C (lit.) |
| evapn. residue | ≤0.005% |
| impurities | ≤0.001% I2 |
| ≤0.001% S compounds | |
| <100 ppm total metallic impurities | |
| InChI | 1S/Br2/c1-2 |
| InChI key | GDTBXPJZTBHREO-UHFFFAOYSA |
| mp | −7.2 °C (lit.) |
| resistivity | 7.8E18 μΩ-cm, 20°C |
| SMILES string | BrBr |
| vapor density | 7.14 (vs air) |
| vapor pressure | 175 mmHg ( 20 °C) |
| 671 mmHg ( 55 °C) |
| Application: | Bromine can be used as a brominating and oxidizing agent in chemical synthesis. It can be used: • To brominate alkylbenzenes at the benzylic position using photocatalytic conditions. • To prepare brominated aromatic compounds by electrophilic aromatic substitution reactions in the presence of Lewis acid catalysts. • For the bromination of carbonyl compounds at a carbonyl group via Hell-Volhard-Zelinski reaction in the presence of phosphorus trihalides. • To prepare isocyanates, carbamates, or amines by reacting with primary amides in the presence of base via Hofmann rearrangement. |
| Other Notes: | Contains organic bromine compounds |
| Packaging: | 50, 250 g in Sure/Seal™ |
| Symbol |    GHS05,GHS06,GHS09 |
| Signal word | Danger |
| Hazard statements | H314 - H330 - H400 |
| Precautionary statements | P260 - P273 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338 |
| Hazard Codes | T+,C,N |
| Risk Statements | 26-35-50 |
| Safety Statements | 7/9-26-45-61 |
| RIDADR | UN 1744 8(6.1) / PGI |
| WGK Germany | WGK 2 |
| Flash Point(F) | Not applicable |
| Flash Point(C) | Not applicable |
| Purity | ≥99.5% (by Na2S2O3, titration); ≥99.99% trace metals basis |
| bp | 58.8 °C (lit.) |
| mp | −7.2 °C (lit.) |
| Density | 3.119 g/mL at 25 °C (lit.) |
| UNSPSC | 12352101 |