2CuI + 6H2SO4 + 2Fe2O3 2CuSO3 + 4FeSO4 + I2 + 6H2O
Copper(I) iodide react with sulfuric acid and iron(III) oxide to produce copper sulfate, iron(II) sulfate iodine and water. Sulfuric acid - concentrated solution. This reaction takes place at a temperature near 80°C.