Shares & Saves. Save. Xenon and halogen lights use a gas to help increase bulb effectiveness, but there are several key differences between them. Halogen lights are an older type of bulb that uses halogen gas primarily as a buffer and backup system, while xenon lights depend wholly on xenon gas to produce light.
Magnesium chloride is the name for the chemical compounds with the formulas MgCl 2 and its various hydrates MgCl 2 (H 2 O) x. These salts are typical ionic halides, being highly soluble in water. The hydrated magnesium chloride can be extracted from brine or sea water.
Epsom salts are made up of a naturally occurring mineral that is found in water. More properly known as magnesium sulfate, the substance derives its popular name from the town of Epsom, England, where the compound was first distilled from water. The chemical formula is a rather simple one: MgS04-7H2O. These salts are easily obtained at any drug store or supermarket.