Overview
2-Methylbutane, commonly known as isopentane, is a branched-chain hydrocarbon belonging to the alkane family. It is one of the three structural isomers of pentane, distinguished by its low boiling point and high volatility. This compound is naturally present in crude oil and natural gas, but it is primarily produced industrially through petroleum refining processes. Due to its physical properties, 2-methylbutane is widely used in various industrial applications, including as a solvent in laboratories, a refrigerant in cooling systems, and a blowing agent in the production of polystyrene and polyurethane foams. Its role as a fuel additive also makes it valuable in the energy sector.
Physical and Chemical Properties
2-Methylbutane is a colorless liquid with a faint petroleum-like odor. It has a molecular weight of 72.15 g/mol and a density of approximately 0.62 g/cm³ at 20°C. The compound's low boiling point of 27.8°C and melting point of -159.9°C make it highly volatile, especially at room temperature. Chemically, 2-methylbutane is relatively inert under normal conditions but reacts vigorously with strong oxidizing agents. It is insoluble in water but mixes well with most organic solvents, including ethanol, ether, and benzene. Its flammability is a critical consideration, as it forms explosive mixtures with air at concentrations between 1.4% and 7.6% by volume.
Main Applications
The primary use of 2-methylbutane is as a blowing agent in the production of expanded polystyrene (EPS) and polyurethane foams. Its volatility allows it to create the cellular structure in these materials, which are widely used in insulation and packaging. In refrigeration systems, it serves as an efficient refrigerant due to its low boiling point. In laboratories, 2-methylbutane is employed as a solvent for various chemical reactions and extractions. The petroleum industry utilizes it as a component in gasoline to improve octane ratings. Additionally, it finds applications in the synthesis of other chemicals, such as isoprene, which is a precursor for synthetic rubber.
Safety and Storage
2-Methylbutane is highly flammable and poses significant fire and explosion hazards. Proper storage is essential to mitigate risks; it should be kept in tightly sealed containers placed in cool, well-ventilated areas away from heat sources and open flames. Grounding and bonding are necessary to prevent static electricity buildup during transfer. Personal protective equipment (PPE), including gloves, goggles, and flame-resistant clothing, should be worn when handling this chemical. In case of spills, immediate containment and evacuation are advised, followed by cleanup using non-sparking tools. Safety data sheets (SDS) must be consulted for detailed emergency procedures and first-aid measures.
B2B Procurement Guide
When procuring 2-methylbutane, industrial buyers should prioritize suppliers that provide certificates of analysis (CoA) to verify purity, typically 99% or higher for most applications. Bulk purchases in ISO tanks or drums are common, but ensure compliance with transportation regulations for flammable liquids. Price fluctuations are common due to its petroleum-derived nature, so buyers should monitor market trends. Long-term contracts may offer stability. Always confirm that the supplier adheres to safety standards and can provide proper documentation, including SDS and transportation permits. Regional availability may vary, so local suppliers are often preferred to reduce logistics risks.
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