HIGH ALTITUDE ESSENTIALS TM Alpha-Arbutin powder is pure and water-soluble. White crystalline powder Solubility: Soluble in warm or cold water Stability: stable against hydrolysis as tested in the pH range from 3.5 - 6.6. Storage: Protected from light and humidity in a clean place at room temperature. Recommended Usage Rate: 0.2 - 2% ( 0.2% when formulated with an exfoliant or penetration enhancer, otherwise up to 2%).
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