Methyl 3-O-β-D-galactopyranosyl-β-D-galactopyranoside is a class of biochemical reagent used in glycobiology research. Glycobiology studies the structure, synthesis, biology, and evolution of sugars. It deals with carbohydrate chemistry, glycan formation and degradation enzymology, protein-glycan recognition, and the role of glycans in biological systems. The field is closely related to basic research, biomedicine and biotechnology[1].