Used in analytical chemistry for the determination of metal ions such as iron, cobalt, nickel, copper, and silver through titration methods, including complexometric and precipitation titrations like the Volhard method. Commonly applied in photometric and spectrophotometric analysis to measure trace metals in environmental, industrial, and biological samples via colored complexes. Serves as a reference solution in quality control and calibration of instruments. Also utilized in the preparation of buffer solutions and in some pharmaceutical testing procedures where precise concentration of thiocyanate is required.