Mercurate(2-),tetrakis(cyano-kC)-,dipotassium,(T-4)-(9CI) (591-89-9)

1.General Description: Denser than water. Toxic by inhalation and ingestion. Produces toxic oxides of nitrogen during combustion.
2.Air & Water: Rapidly decomposes in presence of acids with generation of hydrogen cyanide, a flammable poison gas.
3.Reactivity Profile: Mercuric potassium cyanideis rapidly decomposed by acids to evolve hydrogen cyanide, a flammable poisonous gas. May tend to explosive instability. Incompatible with strong oxidizing agents. Fusion with metal chlorates, perchlorates, nitrates or nitrites can cause violent explosions.Contact with ammonia may be explosive.
4.Health Hazard: TOXIC; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance may cause severe injury, burns or death. Reaction with water or moist air will release toxic, corrosive or flammable gases. Reaction with water may generate much heat that will increase the concentration of fumes in the air. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.
5.Fire Hazard :Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Vapors may accumulate in confined areas (basement, tanks, hopper/tank cars etc.). Substance will react with water (some violently), releasing corrosive and/or toxic gases and runoff. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water.

Cyanide and its compounds, as well as mercury and its compounds, are on the Community Right-To-Know List.