Antimonium tartaricum, also known as potassium antimony tartrate or tartar emetic, is a chemical compound with the formula K(SbO)C4H2O6. It is a white, odorless, and tasteless powder that is highly soluble in water. Historically, it has been used in medicine as an emetic and expectorant, although its use has significantly declined due to its toxicity and the availability of safer alternatives. In homeopathy, it is used to treat various ailments, including respiratory infections and digestive issues. The compound is also known by its common name, tartar emetic, which is derived from its historical use as an emetic agent. In Hebrew, it is referred to as אנטימוניום טרטאריקום, and in German, it is called Schwefelblume or Antimonium tartaricum. The compound's toxicity and potential health risks have led to its restricted use in modern medicine, with most applications now found in homeopathic and historical contexts.