Magnesium sulfate (medical use) ionic strength prevents some of the temporary skin wrinkling (partial maceration) which is caused by prolonged immersion of extremities in pure water. Magnesium and sulfate ions are naturally present in some mineral waters. The claimed health benefits of Epsom Salt baths have not been proven. A magnesium sulphate paste is also available which is claimed to be useful for small boils or localised infections. The standard British Pharmacopoeia composition is dried Magnesium Sulfate 47.76 % w/w, Phenol 0.49 % w/w. and glycerol (E422). Magnesium sulfate has been used as an experimental treatment of Irukandji syndrome caused by envenomation by certain
Magnesium iodide Magnesium iodide Magnesium iodide is the name for the chemical compounds with the formulas MgI and its various hydrates MgI(HO). These salts are typical ionic halides, being highly soluble in water. Magnesium iodide has few commercial uses, but can be used to prepare compounds for organic synthesis. Magnesium iodide can be prepared from magnesium oxide, magnesium hydroxide, and magnesium carbonate by treatment with hydroiodic acid: Magnesium iodide is stable at high heat under a hydrogen atmosphere, but decomposes in air at normal temperatures, turning brown from the release of elemental iodine. When heated in air, it decomposes completely to magnesium