Used primarily as an internal standard in gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS) analyses, especially in lipid profiling and fatty acid methyl ester (FAME) analysis. Its long aliphatic chain and consistent behavior during chromatographic separation make it ideal for quantifying other fatty acid methyl esters in complex biological samples such as blood, tissues, and plant extracts. It is also employed in environmental and food testing to ensure accurate measurement of saturated and unsaturated fatty acids. Due to its stability and low reactivity, it does not interfere with common detection methods and provides reliable calibration across multiple runs.