Malononitrile is a chemical compound with the molecular formula C3H2N2. It is a colorless to pale yellow crystalline solid that is soluble in water and organic solvents. Malononitrile is used primarily in the synthesis of various organic compounds, including pharmaceuticals, agrochemicals, and dyes. It is also used as a reagent in the detection of trace amounts of metals, such as copper and mercury, in environmental and forensic samples. Malononitrile can be toxic if ingested or inhaled in large quantities, and it can cause skin and eye irritation upon contact.