Holmium iodate is an inorganic compound with the chemical formula Ho(IO<sub>3</sub>)<sub>3</sub>. It can be obtained by reacting holmium periodate and periodic acid in water at 170 ðC. Its solubility in water is 1.162ñ0.001 (25 ðC, 103 mol÷dm<sup>âÂÂ3</sup>). Adding ethanol or methanol to water will reduce the solubility.