Octadecane is widely used in the production of phase change materials (PCMs) due to its ability to store and release thermal energy during phase transitions. This property makes it valuable in applications like thermal energy storage systems, where it helps regulate temperature in buildings, reducing energy consumption for heating and cooling. It is also utilized in the formulation of thermal management solutions for electronics, ensuring devices operate within safe temperature ranges. Additionally, octadecane serves as a reference standard in gas chromatography for analyzing hydrocarbon mixtures, aiding in the identification and quantification of similar compounds. Its stability and non-reactive nature make it suitable for use in coatings and lubricants, providing protective and smooth surfaces in industrial applications.