This standard specifies the requirements, test methods, inspection rules and marking, packaging, transportation and storage of the food additive basic magnesium carbonate. This standard applies to the food additive basic magnesium carbonate prepared by precipitation method. This product is used as alkaline agent, anti-caking agent and loosening agent in food processing. Molecular formula: xMgCO|(3)·yMg(OH)|(2)·zH|(2)O