~Items Specification
Appearance  White or off-White Powder
Glucuronic acid（%） ≥44
Assay of Sodium Hyaluronate ≥90
Molecular Weight ≥1×106

Protein（%） ≤0.1
Loss on drying（%） ≤10
PH（0.1% Solution ） 6.0～7.5
Transparency%( 0.1% Solution） ≥98.5
Chloride (Cl) ≤500ppm
Iron(Fe) ≤30ppm
Sulfate ( SO4) ≤300ppm
Heavy Metals ≤15ppm
Lead (Pb) ≤5ppm
Arsenic（As） ≤3ppm
Cadmium (Cd) ≤1ppm
Mercury (Hg) ≤1ppm
Total Plate Count ≤5000cfu/g
Yeast and Molds ≤100cfu/g
E.Coli  Negative in 1g
Staphylococcus Aureus Negative in 1g
Salmonella Negative in 10g
Organic Volatile Impurities Meets the requirements.