(Z)-but-2-ene

(Z)-but-2-ene is an organic compound with the molecular formula C4H8 and CAS number 590-18-1. It is a geometric isomer of but-2-ene, specifically the cis-isomer where both methyl groups are positioned on the same side of the double bond. This alkene belongs to the family of unsaturated hydrocarbons and has a molecular weight of 56.11 g/mol. It is characterized by its four-carbon chain with a double bond between the second and third carbon atoms.

(Z)-but-2-ene is a colorless gas at room temperature and atmospheric pressure with a characteristic hydrocarbon odor. It has a boiling point of approximately 3.7°C and a melting point of around -139°C. The compound is poorly soluble in water but readily dissolves in organic solvents such as alcohols, ethers, and hydrocarbons. It is less dense than water and highly flammable, forming explosive mixtures with air in concentrations between 1.8% and 9.7% by volume.

(Z)-but-2-ene is primarily used as an intermediate in organic synthesis and petrochemical processes. It serves as a starting material for the production of various chemicals including alcohols, aldehydes, and polymers through addition reactions. The compound is also utilized in research applications for studying stereochemistry and isomerization reactions. In industrial settings, it can be employed as a feedstock for the manufacture of specialty chemicals and as a component in certain fuel formulations.

(Z)-but-2-ene requires careful handling due to its flammable nature and gaseous state. Personnel should wear appropriate personal protective equipment including safety goggles, flame-resistant clothing, and ensure adequate ventilation in work areas. All ignition sources must be eliminated from the handling area, and grounding procedures should be followed to prevent static electricity buildup. Work should be conducted in well-ventilated areas or under fume hoods, and gas detection equipment should be available to monitor for leaks.

(Z)-but-2-ene should be stored in properly designed pressure vessels or gas cylinders in cool, well-ventilated areas away from heat sources, sparks, and open flames. Storage areas must be equipped with appropriate fire suppression systems and gas detection equipment. The compound should be kept away from strong oxidizing agents and stored according to local fire codes. Cylinders should be secured upright and protected from physical damage, with regular inspection of storage equipment for leaks or deterioration.

(Z)-but-2-ene exposure primarily occurs through inhalation since it is a gas at room temperature. In case of inhalation, immediately move the affected person to fresh air and keep them at rest in a comfortable breathing position. If breathing difficulties occur, provide oxygen and seek medical attention. For skin contact with liquid form, remove contaminated clothing and wash the affected area with soap and water. Eye contact should be treated by flushing with clean water for at least 15 minutes while seeking medical advice.

(Z)-but-2-ene disposal must comply with local environmental regulations and waste management guidelines. The compound should not be released directly into the atmosphere or sewerage systems. Empty gas cylinders should be returned to the supplier for proper reconditioning. Any waste material should be collected and disposed of through licensed waste management companies capable of handling flammable gases. Incineration in approved facilities with appropriate emission controls is typically the preferred disposal method for this organic compound.

(Z)-but-2-ene is classified under ADR Class 2 for transport as a flammable gas. It must be transported in UN-approved pressure vessels or gas cylinders that meet specifications for compressed gases. Vehicles transporting this material should be equipped with appropriate safety equipment and emergency response information. Drivers must hold valid dangerous goods transport certificates, and transport should follow designated routes when possible. Proper labeling, documentation, and emergency response procedures must be maintained throughout the transportation process.

(Z)-but-2-ene is subject to standard chemical regulations including REACH registration requirements in the European Union for quantities above specified thresholds. It falls under CLP regulation for classification, labeling, and packaging of chemical substances. The compound is not currently listed as a Substance of Very High Concern (SVHC) under REACH. Handlers must comply with workplace safety regulations, environmental protection laws, and transport regulations for flammable gases. Local fire codes and building regulations may also apply to storage and use.

(Z)-but-2-ene is available through specialized chemical distributors across Europe, including OYSI, which serves as a reliable European distributor for various chemical products. When sourcing this compound, ensure the supplier can provide proper documentation including safety data sheets, certificates of analysis, and appropriate packaging for gaseous materials. Consider factors such as purity requirements, quantity needs, and delivery logistics when selecting a supplier. Professional chemical distributors can also provide technical support and regulatory guidance for safe handling and compliance.