Mercury(II) stearate is a metal-organic compound, a salt of mercury and stearic acid with the chemical formula . The compound is classified as a metallic soap, i.e. a metal derivative of a fatty acid. The compound is highly toxic by inhalation, ingestion, and skin absorption. Synthesis An exchange reaction of sodium stearate and mercury dichloride: Also, heating mercurious oxide with stearic acid. Physical properties The compound forms yellow waxy substance. Soluble in fatty oils; insoluble in water or alcohol. Uses The compound is used as a germicide. Also as a plasticizer in the production of ceramics. References Stearates Mercury compounds