Item

Standard

Result

Appearance

White powder

White powder

Assay( Sodium Hyaluronate )                                                         

≥95.0%

98.7%

Glucuronic acid

≥43.0%

44.8%

Molecular weight (Dalton)

≥1.0 ×106

1.42 ×106

pH

6.0-7.5

6.7

Solution transmittance

≥99.0%

99.5%

Loss on drying

<10.0%

6.9%

Residue on Ignition

≤20%

14.67%

Protein

≤0.1%

0.08%

Heavy metals

<20ppm

Complies

Arsenic

<2ppm

Complies

Bacterial counts

<100cfu/g

Complies

Staphylococcus aureus

Negative

Negative

Chlorop Pseudomonas

Negative

Negative