MethylPropanediol (2-methyl-1,3-propanediol or MP diol) is a humectant glycol, a clear and colorless viscous liquid with a very low odor used in personal care products and fragrances. Thanks to its excellent solubilizing and moisturizing properties, 2-methyl-1,3-propanediol is a good alternative for other glycols (Propylene, Butylene, DiPropylene, and Pentylene glycols), Glycerin, and Sorbitol.
MethylPropanediol can serve as an emulsifier HLB value of 8.9 with outstanding lubricating, skin feel, and synergy with Glycerin. It has good antimicrobial properties and acts as a safe preservative booster. In addition, 2-methyl-1,3-propanediol helps control the formulation's viscosity, saves energy processing in low temperatures, and wets pigments in decorative cosmetics. In perfume, it improves spreading and enhances fragrance. It also can serve as a penetration booster for other ingredients like AHAs and BHAs, speeding up adsorption and enhancing the entire effectiveness of the formula.
Frequently glycols are utilized in emulsion products to improve freeze/thaw stability. Test with MP diol-containing products showed the ability of a product to be frozen and then recover without product degradation in multiple cycles in a range of -20°C for twenty-four hours and 25°C for twenty-four hours. It prevents phase separation encountered using traditional glycols. Cosmetic products must exhibit adequate elevated temperature stability in order to be considered satisfactory to enter the marketplace. It is anticipated that ninety days at 45°C will approximate a shelf life of at least two years and Methylpropanediol allows formulators to achieve those standards while producing the clearest products compared to traditional glycols.
Used in all types of skin, lip, nail, and hair care applications, MethylPropanediol is a multifunctional and eco-friendly ingredient that provides even distribution, prolonged moisturization, and better shelf life. Although it is a synthetic ingredient, the cosmetic Ingredient Review expert panel determines methyl-propanediol as safe for use in personal care products, tested for a long period without significant adverse or sensitizing effects on the skin, hair, and nail.