CH2CHCH25CH3

**CH2CHCH25CH3 (Pentane)**

CH2CHCH25CH3 is a chemical compound known as pentane, an alkane with the molecular formula C5H12. It is a straight-chain hydrocarbon composed of five carbon atoms connected in a linear arrangement, with hydrogen atoms filling the remaining valences to satisfy carbon’s tetravalency. Pentane is a colorless, flammable gas at room temperature and is part of the paraffin series, which are saturated hydrocarbons characterized by single bonds between carbon atoms.

Pentane is primarily found in natural gas and crude oil, where it serves as a key component of petroleum fractions. It is also produced synthetically through processes like catalytic cracking and reforming. Industrially, pentane is used as a solvent, particularly in the extraction of natural rubber, the cleaning of grease and oils, and as a component in gasoline blends to improve octane ratings. It is also employed in the production of other chemicals, such as methyl tert-butyl ether (MTBE), a gasoline additive.

In terms of physical properties, pentane has a boiling point of approximately 36.1 °C (97.0 °F) and a melting point of –130 °C (–202 °F). It is slightly soluble in water but miscible with organic solvents. Pentane is relatively non-toxic but poses risks of inhalation, ingestion, or skin contact, as it is volatile and can cause dizziness or respiratory irritation in high concentrations. Proper ventilation and safe handling procedures are recommended during use.

Pentane’s structure and properties make it valuable in various chemical and industrial applications, though its use must be balanced against safety considerations.