Triple magnesium complex maximum coverage 300 mg magnesium oxide magnesium citrate magnesium carbonate, non-gmo, gluten free and soy free formula, 250 tablets. 4.5 out of 5 stars 106. $14.99 $ 14. 99 ($0.06/count) save 5% more with subscribe & save. get it as soon as tomorrow, sep 25. Alibaba offers 49 powder price magnesium carbonate rubber products. a wide variety of powder price magnesium carbonate rubber options are available to you, Magnesium carbonate priceselect 2019 high quality magnesium carbonate price products in best price from certified chinese magnesium carbonate heavy manufacturers, magnesium carbonate precipitated suppliers, wholesalers and factory on made-in-china Other applications are as filler material, smoke suppressant in plastics, a reinforcing agent in neoprene rubber, a drying agent, a laxative to loosen the bowels, and color retention in foods. in addition, high purity magnesium carbonate is used as antacid and as an additive in table salt to keep it free flowing.