Methylpropanediol
INCI: Propanediol
Reviewed by Rosie · Last updated 18 Aug 2026
Also known as: Propanediol
Enhances the absorption of other ingredients
EWG Safety Score
What Is Methylpropanediol?
Methylpropanediol is a synthetic ingredient that functions as solvent for difficult to dissolve materials, including certain powders and preservatives. In a skin care formula, it can enhance the absorption of ingredients such as salicylic acid for better penetration and efficacy.\n\nMethylpropanediol 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.\n\nIn fragrance formulations, methylpropanediol can prolong scent intensity on the skin.\n\nAs a raw material it is clear, colorless liquid.\n\nDuring their evaluation in June 2018, the panel of experts for the Cosmetic Ingredient Review council recognized methylpropanediol as a safe ingredient as traditionally used in cosmetic in products.
Clinical Evidence & References
Published Research
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PubChem, Accessed April 2021, ePublication PubChem, 2021
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Cosmetic Ingredient Review, June 2018, pages 1-73 Cosmetic Ingredient Review, 2018
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Contact Dermatitis, September 2017, pages 159-162 Contact Dermatitis, 2017
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Methylpropanediol is a variant of Propanediol, the form you will most often see on an ingredients list.
Also known as 1,3-propanediol | Improves absorption of ingredients to their boost effectiveness in skin
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Also known as 1,3-propanediol | Improves absorption of ingredients to their boost effectiveness in skin
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