Used in analytical chemistry for the quantitative determination of substances through titration methods. Commonly applied in water and wastewater analysis to assess hardness by measuring calcium and magnesium levels indirectly. Also utilized in the calibration of instruments and validation of analytical procedures in quality control laboratories. Suitable for complexometric titrations when paired with indicators like Eriochrome Black T. Ensures accuracy and traceability in standardized testing protocols across environmental, industrial, and pharmaceutical sectors.