Used primarily as an emollient and conditioning agent in cosmetics and personal care products such as lotions, creams, and hair conditioners. It helps improve texture and spreadability while providing a smooth, non-greasy feel on skin and hair. Also serves as a lubricant in industrial applications and as a plasticizer in the production of biodegradable polymers. Additionally, it is used in the formulation of surfactants and detergents due to its ability to modify surface tension. Methyl stearate finds use as a biodiesel component and fuel additive, improving cold flow properties and lubricity in diesel engines.