470864

Brom

≥99.99% trace metals basis

• Synonym(e): Dibromine
• Empirische Formel (Hill-System): Br₂
• CAS-Nummer: 7726-95-6
• Molekulargewicht: 159.81
• EG-Nummer: 231-778-1
• MDL-Nummer: MFCD00010896
• UNSPSC-Code: 12352101
• PubChem Substanz-ID: 24870690

Eigenschaften

• Dampfdichte: 7.14 (vs air)
• Qualitätsniveau: 100
• Dampfdruck: 175 mmHg ( 20 °C); 671 mmHg ( 55 °C)
• Assay: ≥99.5% (by Na₂S₂O₃, titration); ≥99.99% trace metals basis
• Widerstandsfähigkeit: 7.8E18 μΩ-cm, 20°C
• Verunreinigungen: ≤0.001% I₂; ≤0.001% S compounds; <100 ppm total metallic impurities
• Abdampfrückstand: ≤0.005%
• bp: 58.8 °C (lit.)
• mp (Schmelzpunkt): −7.2 °C (lit.)
• Dichte: 3.119 g/mL at 25 °C (lit.)
• Anionenspuren: chloride (Cl^-): ≤0.05%
• Kationenspuren: Ni: ≤5 ppm; heavy metals: ≤2 ppm
• SMILES String: BrBr
• InChI: 1S/Br2/c1-2
• InChIKey: GDTBXPJZTBHREO-UHFFFAOYSA-N

Beschreibung

Anwendung

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.

Sonstige Hinweise

Contains organic bromine compounds

Sicherheitshinweise

• Piktogramme: GHS05,GHS06,GHS09
• Signalwort: Danger
• H-Sätze: H314 - H330 - H400
• P-Sätze: P260 - P273 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338
• Gefahreneinstufungen: Acute Tox. 1 Inhalation - Aquatic Acute 1 - Eye Dam. 1 - Skin Corr. 1A
• Lagerklassenschlüssel: 6.1B - Non-combustible, acute toxic Cat. 1 and 2 / very toxic hazardous materials
• WGK: WGK 2
• Flammpunkt (°F): Not applicable
• Flammpunkt (°C): Not applicable
• Persönliche Schutzausrüstung: Faceshields, Gloves, Goggles