Overview
trans-2-Butene is an unsaturated hydrocarbon belonging to the alkene family, characterized by a double bond between the second and third carbon atoms in its structure. It is one of the isomers of butene, alongside cis-2-butene and 1-butene. This colorless gas is primarily produced during petroleum refining and is widely used in industrial applications due to its reactivity. As a key intermediate in chemical manufacturing, trans-2-butene plays a vital role in the production of synthetic rubber, plastics, and fuel additives. Its structural properties make it valuable for polymerization and alkylation processes.
Physical and Chemical Properties
trans-2-Butene is a colorless gas at room temperature with a faint, sweet odor. It has a molecular weight of 56.11 g/mol and a density of 0.604 g/cm³ at 20°C. The compound boils at 0.9°C and melts at -105.8°C, making it suitable for low-temperature applications. The double bond in trans-2-butene makes it highly reactive, participating in addition and polymerization reactions. It is slightly soluble in water but dissolves readily in organic solvents like ethanol and ether. Its flammability requires careful handling to prevent fire hazards.
Main Applications
trans-2-Butene is widely used in the chemical industry for producing synthetic rubbers such as polybutadiene and styrene-butadiene rubber (SBR). These materials are essential for manufacturing tires, footwear, and industrial belts. Additionally, it serves as a precursor for plasticizers, resins, and other polymers. In the fuel industry, trans-2-butene is used to enhance octane ratings in gasoline. Its reactivity also makes it valuable in organic synthesis for creating specialty chemicals.
Safety and Storage
Due to its high flammability, trans-2-butene must be stored in a cool, well-ventilated area away from open flames and heat sources. Proper grounding and bonding are essential to prevent static discharge during handling. Personal protective equipment (PPE) such as gloves, goggles, and flame-resistant clothing should be worn when working with this chemical. In case of leakage, evacuate the area and use appropriate extinguishing agents like dry chemical powder or carbon dioxide.
B2B Procurement Guide
When procuring trans-2-butene, verify the purity level (typically 99% or higher) and ensure the supplier provides a Certificate of Analysis (CoA). Packaging options include pressurized cylinders or bulk shipments for large-scale buyers. Compare prices from multiple suppliers, as costs can vary based on market demand and transportation logistics. Always confirm compliance with local and international safety regulations, including proper labeling and Material Safety Data Sheets (MSDS).
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