Magnesium carbonate is an inorganic salt that oftentimes comes as a solid that is white in color. It can also be found existing in other minerals as well. Normally, it is extracted through a mining process. Magnesium carbonate is a non-toxic chemical with a multitude of uses. The uses of the chemical extend from household products to other applications. The principle use of magnesium carbonate is the production of magnesium oxide. It is also used in the making of refractory bricks. It is used in the production of toothpaste, cosmetics, dusting powder, fireproofing, flooring and fire extinguishing. Magnesium carbonate is used in the production of some antacids. It is also added to table salt to keep it flowing more freely. Indeed, its addition to table salt represented one of its first applications in a consumer product. Other applications for magnesium carbonate include its incorporation in laxative products as well as in certain foods. The chemical is incorporated into certain foods in order to preserve or enhance the color of the product. Lastly, it is used in certain sports activities. For example, it is referred to as "chalk" and used to keep hands dry in gymnastics, weight lifting and rock climbing.