Mercurophylline is a

mercurial diuretic Mercurial diuretics are a form of renal diuretic containing mercury. Although previously widely used, they have largely been superseded by safer diuretics such as thiazides, and are hardly used anymore. History and mechanism Inorganic mercury co ...

, having the form of white or yellow odorless powder under room temperature. It was formerly used as medicine, administered through injection or tablets. Mercurophyllin is poisonous when administered subcutaneously, intraperitoneally and intravenously. When administered intravenously, it can cause cardiac arrhythmia. Prolonged oral administration can lead to gastrointestinal irritation and kidney damage.

References

{{organic-compound-stub Mercurial diuretics