Pentacosane is a straight-chain alkane with the chemical formula C25H52. It consists of 25 carbon atoms and 52 hydrogen atoms, making it part of the alkane family, which are saturated hydrocarbons. Pentacosane is a colorless, odorless solid at room temperature and is typically found in natural sources like petroleum and wax. This compound is used in various applications, including as a component in cosmetics and industrial lubricants. Due to its long carbon chain, pentacosane has a high melting point and low volatility, which makes it useful in formulations that require stability and resistance to evaporation.