Solubility: Arbutin is soluble in water, methanol or alcohol. Arbutin is partially soluble in cold water. Arbutin is insoluble in aether, chloroform or benzene. Property Specification Appearance White to light yellow powder or crystalline Assay(HPLC) Min *9.5% Clarity of water solution Transparency, colorless, none suspended matters PH(1% aqua) 5.0~7.0 Arsenic Max 2PPM Moisture <=0.5% Hydroquinone(HPLC) Max. *0PPM Heavy metals Max. *0PPM Loss on drying Max. 0.5% Pathogen Bacteria: Max. **0CPU Fungus: Max. **0CPU Applications: Arbutin, a highly effective depigmenting and/or lightening composition is accepted by world, so it was frequently used as an additive ingredient in the cosmetics or dermatological substance, it can effectually inhibit the formation of melanin. Arbutin is used as skin lightening agents in the cosmetics, especially in advanced cosmetics which have function of lightening skin, sunscreen and dispelling freckle. Reference addition of arbutin: 2.0~7.0% Arbutin break down easily in the acidic environment, so the pH value of cosmetic system should be at more than 6.0 The use of arbutin will be dissolved in the water under *0 celsius degree. Cosmetic system containing arbutin should be added to the amount of antioxidants. Stability and Storage: Notes: Arbutin must store away from oxidizing agents. Arbutin should shield from light. Storage conditions: Keep container tightly sealed. Arbutin should store in cool, dry conditions in well sealed containers. Package: 1kg/bag, aluminum foil bag and PE bag lining. Disposal of used packagings ask official regulations please. Shelf life: *4 months