Dictionary SubstancesInorganic CompoundMagnesium Chloride Magnesium Chloride Last updated: November 18, 2016 What Does Magnesium Chloride Mean? Magnesium chloride is an inorganic salt (compound) that has one magnesium and two chloride ions with the chemical formula MgCl2. Its various hydrates have the formula MgCl2(H2O)x. It is used as a cathartic and in alloys. The magnesium chloride salt is a typical ionic halide and is highly soluble in water. Hydrated magnesium chloride can be produced by extraction from brine or seawater. Anhydrous magnesium chloride is produced on a large scale and it is the primary precursor to magnesium metal. Advertisement Corrosionpedia Explains Magnesium Chloride Magnesium chloride is an inorganic compound containing the elements magnesium and chlorine. It mostly used for dust control, ice control and road stabilization. It is also used to produce magnesium metal, fertilizer, artificial seawater, feed supplements, textiles, paper, fireproofing agents, cements and refrigeration brine. It is also used for wastewater treatment. Magnesium chloride is very corrosive to the metal surfaces of automobiles and causes rust if left on the vehicle for a long period of time. It is thicker than sodium chloride, so it sticks to a car’s finish and is almost impossible to wash off. Magnesium chloride attracts moisture from the air making it more aggressive than salt because it is active even when dry. It clings to everything and is known as a ‘liquid rust.’ Advertisement Share This Term> Related Terms Wastewater Treatment Rust Chlorides Inorganic Compound Steel Corrosion Magnesium Brine Related Reading IOZ Coating Surface Preparation Is Easier than You Think VIDEO: John Oliver on America’s Crumbling Infrastructure An Expert Guide To Accurate Cathodic Protection Measurements Leveraging AI for Enhanced Corrosion Control in Oil Pipelines Corrosion Jobs: How to Become a Corrosion Technician in 2023 The 6 Corrosive Components That Can Be Found in Crude Oil Tags Corrosion Markets Scientific Properties Substances Substances Corrosive Substance Chemical Property Chemical Compound Inorganic Compound Highways and Bridges Trending Articles Corrosion An Introduction to the Galvanic Series: Galvanic Compatibility and Corrosion Chemical Compound 5 Most Common Types of Metal Coatings that Everyone Should Know About Asset Management Understanding Aluminum Corrosion Asset Management If Copper is a Noble Metal then Why Are My Pipes Corroding?