Ferricyanic Acid is a chemical compound with the formula H3Fe(CN)6. This compound is also known as Iron(III) hexacyanoferrate(II) or potassium ferricyanide. It is a dark red crystalline powder that is soluble in water and has a bitter taste. Ferricyanic Acid is used in photography, electroplating, and textile dyeing. The synonyms for Ferricyanic Acid include potassium hexacyanoferrate(III), red prussiate, and potassium ferricyanide trihydrate. This compound is highly toxic and can be dangerous if ingested or inhaled. It is important to handle Ferricyanic Acid with safety precautions to avoid adverse effects on human health and the environment.