Overview
2-Bromo-1-phenylethanone is an organobromine compound serving as a versatile building block in organic synthesis. First synthesized in the late 19th century, it gained industrial importance due to its reactivity as an α-haloketone. The compound's molecular structure features a reactive bromine atom adjacent to a carbonyl group, making it valuable for nucleophilic substitution reactions. In B2B contexts, it's typically supplied in 25kg fiber drums or custom packaging for large-scale pharmaceutical manufacturers. Technical grade (≥95%) is common for industrial applications, while research-grade (≥98%) is preferred for fine chemical synthesis. Global production is concentrated in China, India, and Western Europe.
Physical and Chemical Properties
As a crystalline solid, 2-bromo-1-phenylethanone exhibits moderate stability when stored properly but decomposes upon prolonged exposure to heat or light. Its bromine atom shows high electrophilicity, with a Hammett substituent constant (σp) of 0.23 indicating moderate electron-withdrawing effects. The compound undergoes characteristic reactions including nucleophilic substitution (SN2), ketone reductions, and Friedel-Crafts acylations. Infrared spectroscopy typically shows strong C=O stretching at 1685 cm⁻¹ and C-Br absorption at 560 cm⁻¹. Its vapor pressure is 0.03 mmHg at 25°C, requiring handling in fume hoods.
Main Applications
Approximately 65% of global production is consumed by the pharmaceutical industry, where it serves as an intermediate for antidepressants (e.g., bupropion synthesis) and anticholinergic drugs. In agrochemicals, it's used to produce certain fungicides and plant growth regulators. Other applications include peptide coupling via Dakin-West reactions, synthesis of heterocyclic compounds, and as a photoinitiator in polymer chemistry. Recent research explores its potential in metal-organic framework (MOF) synthesis and as a precursor for bioactive molecules with antimicrobial properties.
Safety and Storage
Classified as a Category 2 skin irritant and eye damage agent under GHS, this compound requires proper PPE including nitrile gloves, goggles, and respirators for powder handling. Spills should be neutralized with sodium thiosulfate solution before disposal as hazardous waste. Long-term storage stability is maximized under inert gas (argon/nitrogen) with desiccants. Shelf life typically exceeds 2 years when stored at 2-8°C in amber glass containers. Compatibility issues exist with strong bases, oxidizing agents, and some plastics like PVC.
B2B Procurement Guide
When sourcing 2-bromo-1-phenylethanone, prioritize suppliers with ISO 9001 certification and batch-specific COAs. Key quality indicators include melting point range (48-51°C), HPLC purity (≥98% for pharmaceutical use), and low heavy metal content (<10ppm). Bulk buyers (1+ metric tons) can negotiate 10-15% discounts, especially for annual contracts. Sea freight requires UN 3261 packaging (Class 8 corrosive), while air shipments follow IATA PI802 regulations. Emerging alternatives like continuous flow synthesis may impact future pricing dynamics.
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