Uric acid is a heterocyclic compound of carbon, nitrogen, oxygen, and hydrogen with the formula C₅H₄N₄O₃. It forms ions and salts known as urates and acid urates, such as ammonium acid urate. Formula: C5H4N4O3 IUPAC ID: 7,9-Dihydro-1H-purine-2,6,8(3H)-trione Molar mass: 168.1103 gmol Melting point: 300 °C Density: 1.87 gcm³ Soluble in: Water Appearance: White crystals