N/200 GCH Solution is commonly used in medical and laboratory settings for diagnostic purposes, particularly in serological tests. It serves as a diluent or reagent in various immunological assays to detect antibodies or antigens in patient samples. The solution is often employed in tests like the Wassermann reaction, which is used to diagnose syphilis. Its precise concentration ensures accurate and reliable results in these diagnostic procedures. Additionally, it may be utilized in research laboratories for studying immune responses and developing new diagnostic methods. Its role in these applications highlights its importance in both clinical diagnostics and scientific research.