Sodium hyaluronate (SH for short) is a white fibrous or powdery solid with strong moisture absorption, soluble in water but insoluble in alcohol, ketone, ether and other organic solvents. Its aqueous solution is negatively charged and exhibits high viscoelasticity and osmotic pressure at high concentrations. Because of its special properties, sodium hyaluronate has been widely used in the fields of medicine, cosmetics and health food
