Sodium hyaluronate, also known as sodium hyaluronate is a kind of natural mucopolysaccharide, which is widely used in medical beauty, bone and joint health care and beauty fields.

The molecular formula is (C₁₄H₂₀NO₁₁Na)_n, which is a kind of high molecular polymer composed of disaccharide repeats of D-glucuronic acid and N-acetyl-glucosamine, with a molecular weight of 500,000 to 2 million. The quality is divided into food grade, cosmetic grade and pharmaceutical grade.

It is white amorphous powder, odorless and tasteless, hygroscopic, soluble in water, insoluble in organic solvents.