Methylpropanediol Good Solvent Hydration Methylpropanediol at a glance Often used as a solvent and to enhance the absorption of other ingredients into skin Characteristically hydrating; may leave a dewy finish on skin Can be used to support a preservative blend Also goes by the technical name 2-methyl-1,3-propanediol As a raw material it is clear, colourless liquid Methylpropanediol description Methylpropanediol is a synthetic ingredient that functions as solvent. In a skin care formula, it can enhance the absorption of ingredients such as salicylic acid for better penetration and efficacy. Methylpropanediol also has pronounced hydrating properties that can leave a smooth, dewy finish on skin. It is sometimes used as part of preservative blend where it helps boost the effectiveness of preservatives, so a lower amount of them is necessary. As a raw material it is clear, colourless liquid. During their evaluation in June 2018, the panel of experts for the Cosmetic Ingredient Review council recognised methylpropanediol as a safe ingredient as traditionally used in cosmetic in products. Related ingredients: Propanediol