Appearance

Off-white to light yellow powder

Melting point

230~250°C

Solubility (H2O)

Soluble in water

Specific Rotation

+80°~ +95°

Loss on Drying

≤3.0%

Heavy Metals

≤10ppm

Total Microbial Count

≤1,000 per/g

Moulds and Yeasts

≤100 per/g

Escherichia coli

Negative

Salmonella

Negative

Particle Size

100% through 20 mesh

80% through 80 mesh

Assay

R-Alpha Lipoic Acid

≥80.0% (External Standard)

Assay

R-(+)-Lipoic Acid Sodium

≥99.0% (Area Normalization)