Sucrose in Veronal Buffered Saline (VBS) is primarily used in biological and immunological research. It serves as a stabilizing agent in the preparation and preservation of cells and tissues. The solution is often employed in complement fixation tests, where it helps maintain the integrity of red blood cells during antibody-antigen reactions. Additionally, it is utilized in various laboratory assays to create an isotonic environment, ensuring that cells remain viable and functional under experimental conditions. The buffering capacity of Veronal helps maintain a stable pH, which is crucial for the accuracy and reproducibility of biochemical experiments.