Appearance: White crystals or crystalline powder

Identification-infrared adsorption: Complies with the reference spectrum of alpha-Arbutin

pH: 5.0~7.0

Melting point : 202℃~210℃

Specific rotation[α]:D20 +175°~+185°

Loss on drying: ≤1.0%

Clarity of solution: Solution is clear, its transmittance at 430nm is not less than 95%

Hydroquinone : ≤10ppm

Heavy metals: ≤10ppm

Arsenic: ≤2ppm

Residue on ignition: ≤0.5%

Assay: ≥99.5%

Total viable aerobic count: ≤1000cfu/g

Total yeast and mould: ≤100cfu/g

E. Coli: Absent/g

Staphylococcus aureus : Absent/g

Pseudomonas: Absent/g