Dipropylene Glycol is a clear, nearly odourless, hygroscopic liquid solvent and humectant commonly used in skincare and haircare formulations. In skincare, it functions primarily as a solvent for active ingredients and as a penetration-enhancing agent: by virtue of its dual water- and oil-solubility, it helps lipophilic and hydrophilic actives to disperse and penetrate the stratum corneum more uniformly.

It also contributes to improved spreadability, lowered surface tension and enhanced skin feel, thereby enabling brand-owners to formulate lighter textures or clearer fluid systems that still deliver actives efficiently. Furthermore, because it is hygroscopic, it offers modest humectant behaviour — attracting moisture and assisting in hydration maintenance on the skin surface.

In haircare systems, the raw material supports improved formulation performance by aiding solubilisation of conditioning agents, fragrances and colourants, and by contributing to improved wet-comb or rinse behaviour. Its solvent capability allows more consistent incorporation of lipophilic styling agents, pigments or fragrances in shampoos, conditioners, tonics or leave-on treatments. As a result, brand-owners can achieve more refined textures, faster deposition and smoother sensory profiles in haircare products that include Dipropylene Glycol.