Zinc stearate is a type of salt that is derived from zinc and stearic acid. It is a white, powdery substance that is insoluble in water and soluble in most organic solvents. Zinc stearate is commonly used as a lubricant, release agent, and anti-caking agent in various industries, including the plastics, rubber, and pharmaceutical industries. It is also used as a flatting agent in coatings and as a stabilizer in PVC. Zinc stearate is generally considered safe for use in these applications, but it should not be ingested or inhaled as it can be harmful to human health.