Before revision: Representative iodides CompoundFormulaAppearanceUse or occurrencePotassium iodide KI white crystals iodine component of iodized salt, protection of the thyroid gland during a radiation emergencyHydrogen iodide HI colourless gas strong mineral acidSilver iodide AgI yellow powder that darkens in light photoactive component of silver-based photographic filmThyroxine(3,5,3′,5′-tetraiodothyronine) C15H11I4NO4 pale yellow solid hormone essential for human health Natural occurrence Iodargyrite—natural, crystalline silver iodide—is the most common iodide mineral currently known.
After revision: Representative iodides CompoundFormulaAppearanceUse or occurrencePotassium iodide KI white crystals iodine component of iodized salt, protection of the thyroid gland during a radiation emergency or during the use of radiopharmaceuticalsHydrogen iodide HI colourless gas strong mineral acidSilver iodide AgI yellow powder that darkens in light photoactive component of silver-based photographic filmThyroxine(3,5,3′,5′-tetraiodothyronine) C15H11I4NO4 pale yellow solid hormone essential for human health Natural occurrence Iodargyrite—natural, crystalline silver iodide—is the most common iodide mineral currently known.