Bromocyclopentane CAS 137-43-9

1. Bromocyclopentane is widely used as a versatile building block in synthetic organic chemistry to prepare complex molecules , and serves as a precursor for the synthesis of cyclopentene, cyclopentanol, and the pharmaceutical intermediate cyclopentathiazide .
2. Bromocyclopentane CAS 137-43-9 is utilized as an intermediate in pharmaceutical development for creating drug synthesis intermediates , and in material science for producing specialty polymers and resins used in coatings and adhesives .
3. Applications of Bromocyclopentane also include its use as a fatty bromide solvent , an intermediate for surfactants and agrochemicals , and for preparing nitrocyclopentane via reaction with sodium nitrite .

1. Store Bromocyclopentane in a tightly sealed container in a cool, dry, and well-ventilated place, away from heat, sparks, and open flames . Recommended storage temperatures vary from room temperature in a cool, dark place below 15°C to refrigeration at 0-8°C .
2. Keep Bromocyclopentane away from strong oxidizing agents and strong bases, as these are incompatible materials that may cause hazardous reactions . Bromocyclopentane CAS 137-43-9 is stable under normal conditions but may darken upon storage .
3. Always use appropriate personal protective equipment (PPE) including chemical-resistant gloves (nitrile rubber recommended), safety goggles, and protective clothing; use only with adequate ventilation or in a fume hood, and avoid breathing vapors, mist, or gas .

1. Immediately isolate the spill area, eliminate all ignition sources, and provide adequate ventilation; contain Bromocyclopentane using inert, non-combustible absorbent material (e.g., dry sand) and prevent entry into drains or waterways .
2. Carefully collect Bromocyclopentane CAS 137-43-9 using an electrically protected vacuum cleaner or by wet-brushing with spark-proof tools, and place it into a sealed, labeled chemical waste container for proper disposal according to local regulations . Use clean, non-sparking tools for collection .
3. Personnel must wear suitable PPE including self-contained breathing apparatus if necessary during cleanup . Vapors can accumulate to form explosive concentrations in low areas; under fire conditions, decomposition produces toxic and irritating fumes including carbon monoxide and hydrogen bromide gas .

1. Bromocyclopentane is classified as a flammable liquid and vapor (H226, GHS signal word "Warning") with a flash point ranging from 35-42°C (95-107°F) . Bromocyclopentane CAS 137-43-9 causes skin irritation (H315), serious eye irritation (H319), and may cause respiratory irritation (H335) . NFPA health rating is 1 (irritation only) .
2. Bromocyclopentane is harmful if swallowed, inhaled, or absorbed through the skin, and may cause target organ effects . Its vapors are heavier than air (vapor density 5.0) and may form explosive mixtures with air . Thermal decomposition produces toxic fumes including carbon monoxide and hydrogen bromide gas .
3. Always consult the specific Safety Data Sheet (SDS) for Bromocyclopentane for complete hazard information, first-aid procedures (P303+P361+P353 for skin, P305+P351+P338 for eyes, P301+P330+P331 for ingestion), and handling instructions. Precautionary statements include P210 (keep away from heat/sparks/open flames), P233 (keep container tightly closed), P240 (ground/bond container), P241 (use explosion-proof equipment), and P280 (wear protective gloves/eye protection) . UN classification is UN1993 or UN2734, Hazard Class 3, Packing Group III .