Magnesium carbonate powder may help maintain overall health and wellness. † magnesium is used in more than 300 different reactions in the body and may help maintain healthy heart function. † magnesium carbonate powder may aid in digestion, support oral and bone health, fortify the immune system, and aid healthy sleep. There are 2,006 white powder magnesium carbonate suppliers, mainly located in asia. the top supplying countries or regions are united states, china, and india, which supply 1%, 95%, and 2% of white powder magnesium carbonate respectively. white powder magnesium carbonate products are most popular in united states, united kingdom, and canada. Magnesium is an essential nutrient found in many foods. magnesium carbonate (not to be confused with magnesium citrate) is an inorganic salt that is white in appearance with the chemical symbol mgco3. magnesium carbonate is insoluble and does not dissolve in water. because of its insolubility, magnesium carbonate is often used in table salts to prevent In need for calcium carbonate should be in market price destination port for calcium carbonate is saudi arabia prefer to import from china . last updated: dec 06, 2018 this buyer wants to receive quotations only from premium members.