Zinc Stearate is probably the most commonly used binding agent in powder makeup products such as face powders or eyeshadows. It gives very good adherence qualities meaning it helps powders to stick together in the pan and to stick to the skin on application.
Safety Information: The Food and Drug Administration (FDA) includes Magnesium and Zinc Stearate on its list of substances considered Generally Recognized As Safe (GRAS ) for direct addition to food.