Pent-2-ene

Pent-2-ene is an alkene hydrocarbon with the molecular formula C5H10 and CAS number 109-68-2. It is an unsaturated organic compound featuring a double bond between the second and third carbon atoms in a five-carbon chain. With a molecular weight of 70.13 g/mol, pent-2-ene exists as geometric isomers (cis and trans forms) due to the restricted rotation around the double bond.

Pent-2-ene is a colorless liquid at room temperature with a characteristic hydrocarbon odor. As an alkene, it exhibits typical properties of unsaturated hydrocarbons including reactivity at the double bond site. The compound has low water solubility but is soluble in organic solvents. Its classification as Class 3, Group II under ADR indicates it is a flammable liquid with moderate flash point characteristics.

Pent-2-ene is primarily used as an intermediate in organic synthesis and chemical manufacturing processes. It serves as a building block for producing various chemicals through addition reactions across its double bond. The compound finds applications in polymer chemistry, pharmaceutical intermediates synthesis, and as a starting material for specialty chemical production in industrial processes.

Pent-2-ene requires careful handling due to its carcinogenic (Carc. 1B), mutagenic (Muta. 1B), and aspiration toxicity (Asp. Tox. 1) properties. Use appropriate respiratory protection, chemical-resistant gloves, and eye protection. Work in well-ventilated areas or under fume hoods. Avoid skin and eye contact, and prevent inhalation of vapors. Implement strict hygiene measures and use proper containment systems during handling operations.

Pent-2-ene must be stored in tightly sealed containers in a cool, dry, well-ventilated area away from heat sources, sparks, and open flames. Keep containers in secondary containment systems and separate from incompatible materials such as strong oxidizers. Storage areas should be equipped with appropriate fire suppression systems and maintained at stable temperatures to prevent vapor buildup and degradation.

Immediate action is required upon contact with pent-2-ene. For skin contact, remove contaminated clothing and wash thoroughly with soap and water. In case of eye contact, flush immediately with plenty of water for at least 15 minutes. If inhaled, move to fresh air immediately. Due to its serious health hazards (carcinogenic and mutagenic properties), seek immediate medical attention for any exposure incident.

Pent-2-ene disposal must comply with local and national hazardous waste regulations due to its classification as a dangerous substance. Contact licensed hazardous waste disposal companies for proper treatment. Never discharge into drains, sewers, or the environment. Contaminated materials and containers should be treated as hazardous waste. Incineration at authorized facilities under controlled conditions is typically the preferred disposal method.

Pent-2-ene is classified under ADR as Class 3 (flammable liquids), Packing Group II, requiring specific transport regulations. Use UN-approved packaging and labeling with appropriate hazard diamonds. Transport vehicles must comply with ADR requirements including proper ventilation, fire extinguishers, and driver certification. Documentation must include proper shipping names, hazard classifications, and emergency response information.

Pent-2-ene is subject to comprehensive chemical regulations including REACH registration requirements in Europe and CLP classification obligations. Its classification as Carc. 1B and Muta. 1B means it falls under strict workplace exposure limits and requires detailed safety data sheets. Users must implement risk management measures and may need authorization for certain uses under chemical safety legislation.

Pent-2-ene is available through specialized chemical distributors in Europe, including OYSI, a professional distributor of technical chemicals. Due to its hazardous classification, purchase requires compliance with regulatory requirements and proper handling capabilities. Suppliers must provide complete safety documentation and ensure proper packaging and transport according to ADR regulations for safe delivery to qualified users.