D-Galactose-6-O-sulfate sodium salt is widely used in biochemical research, particularly in the study of carbohydrate metabolism and enzyme activity. It serves as a substrate for investigating the function of sulfatases and other enzymes involved in the breakdown of sulfated sugars. This compound is also utilized in the development of diagnostic assays to detect enzyme deficiencies related to metabolic disorders. Additionally, it plays a role in glycobiology research, helping to understand the structure and function of sulfated glycans in cellular processes. Its applications extend to the pharmaceutical industry, where it is used in the synthesis of glycosaminoglycans and other therapeutic agents targeting carbohydrate-related diseases.