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.
An exchange reaction of sodium stearate and mercury dichloride:
Also, heating mercurious oxide with stearic acid.
The compound forms yellow waxy substance.
It is used as a germicide and as a plasticizer in the production of ceramics.