This standard specifies the requirements, test methods, inspection rules, signs, labels, packaging, transportation and storage of industrial hydrated basic magnesium carbonate. This standard applies to industrial hydrated basic magnesium carbonate made from dolomite, brine and sodium carbonate. This product is mainly used as filler and reinforcing agent in industries such as rubber, insulation materials, plastics and pigments. Molecular formula: xMgCO|(3)·yMg(OH)|(2)·zH|(2)O