Phenanthrene standard solution is primarily used in analytical chemistry as a reference material for the calibration and validation of instruments, particularly in gas chromatography (GC) and high-performance liquid chromatography (HPLC). It serves as a benchmark for identifying and quantifying phenanthrene in environmental samples, such as soil, water, and air, which is crucial for monitoring pollution levels and assessing environmental health. Additionally, it is employed in research laboratories to study the behavior, degradation, and transformation of polycyclic aromatic hydrocarbons (PAHs) in various matrices. This solution is also utilized in quality control processes to ensure the accuracy and reliability of analytical methods in industries dealing with petrochemicals, fuels, and environmental testing. Its role in standardizing measurements makes it essential for achieving consistent and reproducible results in scientific studies and regulatory compliance.