Used as a reference standard in analytical laboratories for calibration and quality control in techniques like HPLC, GC, and spectrophotometry. Ensures accurate quantification of surfactants in environmental, pharmaceutical, and industrial samples. Commonly applied in wastewater analysis to monitor surfactant levels. Also used in research and development for method validation and in educational labs for teaching analytical techniques. Helps maintain consistency and reliability in testing procedures involving anionic surfactants.