Used primarily for determining water content in various substances, Karl Fischer reagent is essential in industries where precise moisture measurement is critical. It is widely applied in pharmaceuticals to ensure the quality and stability of drugs by controlling moisture levels during production and storage. In the chemical industry, it helps monitor reactions where water presence can affect yield or purity. The reagent is also used in food and beverage analysis to maintain product consistency and shelf life. Additionally, it plays a role in petroleum and plastics manufacturing, where trace moisture can impact material properties or processing efficiency. Its high accuracy and specificity for water make it a standard method in analytical laboratories.