CCCCC

CCCCC is the SMILES notation for n-pentane, the straight-chain isomer of pentane with five carbon atoms. Its chemical formula is C5H12, and the representation CCCCC denotes a linear arrangement of five carbons connected by single bonds.

As a linear alkane, n-pentane is nonpolar and shares properties common to low-boiling hydrocarbons. At room temperature it appears as a colorless, volatile liquid. Its approximate physical properties include a boiling point around 36°C, a melting point near -130°C, and a density of about 0.63 g/mL. Vapors are flammable and can form explosive mixtures with air.

Occurrence and production: n-Pentane occurs in small amounts in crude oil and natural gas. It is produced during refining and is often obtained as a distillate fraction. It is valued as a solvent and as a chemical feedstock for various industrial processes.

Uses: n-Pentane is widely used as a solvent in laboratories and industrial applications and as a component in hydrocarbon solvent blends. It is also used as a blowing agent in polystyrene foam production due to its volatility and low boiling point.

Isomerism and naming: There are three structural isomers of C5H12. The form denoted by CCCCC is the unbranched or n-pentane. The other two isomers are isopentane (2-methylbutane) and neopentane (2,2-dimethylpropane), which differ in branching but share the same molecular formula.

Safety: n-Pentane is a flammable liquid. Vapors can travel and may form explosive mixtures with air. It should be stored in a well-ventilated area away from heat, sparks, and open flames, with appropriate handling precautions.