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ammonium carbonate a white powder that is used in baking powder, smelling salts, and substances for fire-extinguishing.
calcium carbonate a white crystalline compound found in chalk, limestone, marble, shells, and plant ash that is used in the manufacture of cement, paints, plastics, and polishing agents such as toothpaste.
lithium carbonate a powdery salt used in making glass, ceramics, and dyes, and as a drug to treat manic-depressives.
potassium carbonate an alkaline crystalline powder used to make products such as glass, ceramics, and soaps.
sodium carbonate a grayish-white powder, the anhydrous sodium salt of carbonic acid, used in the manufacture of glass, ceramics, soap, and sodium salts, and in bleaching and water treatment; soda ash. [2 definitions]