Test Items

Standard

Appearance

White powder

Hyaluronic acid

≥95%

Molecular weight

(0.5-1.0) x 10⁶

Chlorides

≤0.5

pH

5.5-8.0

Iron

<80ppm

Loss on drying

≤10%

Protein

≤0.1%

Nitrogen

3.0%-4.0%

Heavy metal

≤10ppm

Bacterial counts

≤100cfu/g

Mold and Yeast

≤10cfu/g

Endotoxin

≤0. 5eu/mg

Nucleic Acids (A260nm)

<0.5

Sterile Test

Complies