.Polyhydroxystearic Acid (PHS) is a 100% plant-derived, biodegradable anionic polymer produced from castor beans. It appears as a waxy soft paste or viscous liquid at room temperature. PHS functions as a dispersant, texturing agent, emulsifier, and film former. In color cosmetics, it enhances gloss and its suspending properties help distribute pigment evenly. As a film former, it traps moisture and helps keep the skin hydrated. Research shows that PHS is non-irritating and non-sensitizing. Its high molecular weight ensures that it does not penetrate the skin. Additionally, it has thickening, oil-gelling, and texturing properties. PHS exhibits both thermal and pH stability and is compatible with most ingredients. It is eco-friendly, being biodegradable and produced from 100% renewable resources.