Humectant

Analysis of Structural Differences in Diols: Moisturization, Co-solvency, Skin Feel, and Formulation Selection for Propylene Glycol, Butylene Glycol, and Medium- to Long-Chain 1,2-Alkanediols

Butylene glycol and propylene glycol are commonly used in skincare products, cleansing products, and color cosmetics. They are often classified as humectants, but understanding these ingredients only from the perspective of “moisturization” underestimates their actual value in formulations.