Used as a highly sensitive reagent for the spectrophotometric determination of alkaline earth metals, such as calcium, magnesium, strontium, and barium. It forms colored complexes with these metals, enabling precise measurement of their concentrations in various samples, including biological and environmental matrices. Applied in environmental monitoring to detect trace amounts of alkaline earth metals in water and soil. Also utilized in metallurgical industries for quality control and analysis of metal alloys. Its selectivity and sensitivity make it valuable in research laboratories for studying metal ion interactions and developing analytical methods.