Polyhydroxystearic Acid (Polyhydroxystearic Acid)

Polyhydroxystearic Acid is a multifunctional fatty acid polymer widely used in cosmetic formulations as a pigment dispersant and rheology modifier, particularly in anhydrous and high-pigment systems. By adsorbing onto pigment and mineral surfaces, it helps improve wetting and dispersion, reducing agglomeration and promoting more uniform color development, enhanced payoff, and smoother application. It also contributes to better stability by helping prevent settling and separation, supporting consistent viscosity and improved suspension of insoluble powders such as iron oxides, titanium dioxide, and coated pigments. Polyhydroxystearic Acid is commonly found in foundations, concealers, tinted moisturizers, sunscreens, color cosmetics, and mineral-based products, and is frequently paired with esters, silicones, and film formers to optimize slip, spreadability, and wear. Use level and processing method are guided by supplier specifications, with attention to dispersion technique, order of addition, and compatibility with the selected oils, waxes, and surface-treated powders in the finished system.