2-Nitrophenyl β-D-glucopyranosiduronic acid is a biochemical reagent employed in glycobiology research. Glycobiology investigates the structure, synthesis, biology, and evolution of sugars, encompassing carbohydrate chemistry, the enzymology of glycan formation and degradation, protein-glycan interactions, and the role of glycans in biological systems. This field is closely associated with fundamental research, biomedicine, and biotechnology.