Mannosan, 95% (1,6-Anhydro-β-D-mannopyranose, 95%), is a biochemical reagent employed in glycobiology research. This field explores the structure, synthesis, biological roles, and evolution of sugars, encompassing carbohydrate chemistry, glycan formation and enzymatic degradation, protein-glycan recognition, and the roles of glycans in biological systems. It has significant connections to fundamental research, biomedicine, and biotechnology.