Used in titration procedures to determine the concentration of reducing agents in various samples. Commonly applied in water treatment to measure residual sulfite levels, ensuring proper dechlorination. Also utilized in the food and beverage industry to monitor sulfur dioxide content, helping maintain product quality and compliance with safety regulations. In pharmaceutical manufacturing, it supports quality control by verifying the active ingredient in sulfite-based formulations. Its precise concentration allows for accurate and reproducible analytical results in laboratory settings.