Alpha Lipoic Acid                              99-101%                                     99.5%

Identification

Result

Aspect

Light yellow powder

Complied

Identification

The retention time of the peak for alpha lipoic acid in the chromatogram of the Assay preparation corresponds to that in the chromatogram of the standard preparation,as obtained in the Assay

Complied

Specific optical rotation

-1.0°~+1.0°

0.6°

Melting point

60-62°C

61°C

Loss on drying

0.2% max.

0.19%

Bulk density

≥0.60 g/ml

Complied

Polymer content

2% max.

Complied

6-8-epitrithiooctanoic acid

0.2% max.

Non detectable

Heavy metals

≤10ppm

Complied

Chloride

≤0.07%

Complied

Limit of polymer content

≤2.0%

Complied

Residual of Cyclohexane

≤500ppm

Complied

Residual of Ethyl Acetate

≤250ppm

Complied

Residual of Toluene

≤20ppm

Complied

Total aerobic count

Not more than 1000cfu/gram

Complied

Yeast & Mold

Not more than 100cfu/gram

Complied

E. Coli

Salmonella

Staphylococcus

Negative

Negative

Negative

Complied

Complied

Complied