This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of food additive potassium carbonate. This standard applies to food additive potassium carbonate produced by electrolytic carbonization, ion exchange and other processes. This product is used as a leavening agent in food. Molecular formula: K|(2)CO|(3) Relative molecular mass: 138.21 (according to the 1989 international relative atomic mass)