Phenanthrene standard solution is primarily used in analytical chemistry for calibration and quality control purposes. It serves as a reference material in gas chromatography (GC) and high-performance liquid chromatography (HPLC) to identify and quantify phenanthrene in environmental samples, such as soil, water, and air. This solution is also employed in research studies to investigate the behavior and distribution of polycyclic aromatic hydrocarbons (PAHs) in various ecosystems. Additionally, it aids in the development and validation of analytical methods for detecting PAHs, ensuring accuracy and reliability in environmental monitoring and regulatory compliance.