α-Arbutin and β- Arbutin:

Trade Name     α-Arbutin
Chemical name  4-Hydroxyphenyl-α-D-glucopyranoside
CAS No.        84380-01-8
ELINCS No.     440-470-8
INCI name      Alpha-Arbutin
Molecular Formula   C₁₂H₁₆O₇
Molecular Weight    272.25
Chemical Structure         
Specifications
Appearance   White powder
Purity   ≥99% （HPLC）
Melting point    202-212℃
Specific rotation [α]20D  +180±6°
Solution        Clear
Loss on drying    Less than 1.0%
Microbiological
Specified pathogens   None
Microbial count   ≤100 CFU/g
Fungus     ≤50 CFU/g
Storage
α-Arbutin (Alpha-Arbutin) should be stored in the original sealed pouchs protected from light and humidity in a clean area at a temperature of between 10 and 30°C.
If stored under the recommended conditions, α-Arbutin remains stable for 3 years.
Packing
1kg  PVC+aluminum pouch