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Propanediol is a versatile ingredient commonly used in skincare formulations as a humectant and solvent. As a humectant, it helps attract and retain moisture in the skin, promoting hydration and preventing dryness. Propanediol forms a protective barrier on the skin's surface, reducing water loss and maintaining optimal moisture levels. Its small molecular size allows for easy penetration into the skin, enhancing its hydrating effects. In formulations, Propanediol acts as a solvent, aiding in the distribution and dissolution of other ingredients, resulting in a well-blended product. Its hygroscopic nature contributes to the overall stability and texture of skincare formulations.