Hyaluronic Acid is mucopolysaccharide-like substances, it is a linear, unbranched, high molecular weight polysaccharides compose

Characteristics
White or almost white, very hygroscopic grain or powder, without odor, turn to clear solution when dissolved in water; insoluble in ethanol,
acetone and aether.
Examination
pH(1% water solution)	6.0-7.5
Transparency	≥99.0%
Loss on drying	≤10.0%
Kinematic viscosity	Practical value
Molecular weight	≥1.00×106
Protein	≤0.1%
Heavy metals(as Pb)	≤20ug/g
Assay
Glucuronic Acid	≥44.0%
Sodium Hyaluronate	≥91.0%
Microbial Examination
Bacteria counts	<10cfu/g
Mold&Yeast	<10cfu/g
Staphylococcus aureus	negative
Pseudomonas aeruginosa	negative

hyaluronic acid