May 20, 2018u00a0u00b7 buy vital concept double magnesiumdaily dose 250 mg super quality magnesium. double source magnesium citrate and magnesium carbonate, best absorption. 90 veggie capsules, 45 days on amazon free shipping on qualified orders Magnesium carbonate is insoluble and does not dissolve in water. because of its insolubility, magnesium carbonate is often used in table salts to prevent clumping. also, often referred to as chalk, magnesium carbonate is commonly used by athletes as a drying agent to aid with grip in sports like rock climbing, gymnastics, baseball, and weight ... Magnesium carbonate is odorless white powder. it has the melting point of 350 degree celsius and all forms of magnesium carbonate reacts with acids. uses of magnesium carbonate. the primary use of it is in the magnesium oxide production through calcining process. magnesium carbonate is used for flooring, fireproofing, in cosmetics and toothpaste. Apr 24, 2017u00a0u00b7 magnesium carbonate (mgco3) is a white solid, readily found in nature as magnesite and which usually occurs in a hydrated form, clustered with water molecules. it has some industrial uses, such as in glass production, but some everyday uses as well.