Used in volumetric titration procedures to determine chloride, bromide, iodide, and cyanide content in samples through complex formation or precipitation reactions. Commonly applied in water quality testing, environmental monitoring, pharmaceutical analysis, and industrial quality control where accurate measurement of these anions is required. The standardized solution provides precise and reliable quantification due to its known concentration and consistent reactivity, forming stable mercury halide or cyanide complexes. Suitable for both manual and automated analysis, often with indicators such as diphenylcarbazone for endpoint detection.