Used primarily in titration analysis to determine the concentration of reducing agents, such as sulfhydryl groups, or in the quantification of primary aromatic amines via diazotization, and certain pharmaceutical substances. Commonly applied in redox titrations and diazotization procedures where precise measurement of reactive components is required. Widely utilized in quality control laboratories for food, pharmaceutical, and chemical industries to ensure product consistency and compliance with pharmacopoeia standards. Its role as a standardized 0.1 mol/L solution enables accurate determination of analytes in various sample matrices.