Used as a reference standard in analytical chemistry for the calibration of instruments such as gas chromatographs (GC) and high-performance liquid chromatographs (HPLC). Commonly applied in environmental testing to detect and quantify aromatic hydrocarbons in air, water, and soil samples. Also utilized in quality control processes within the petrochemical industry to ensure accurate measurement of trimethylbenzene isomers in complex mixtures. Its precise concentration makes it ideal for validating analytical methods and maintaining compliance with regulatory standards.