magnesium (mag-ne'se-um)

A silvery white metal, which readily oxidizes in moist air, is both malleable and ductile, melts at a red heat, and, on ignition, burns with a brilliant white light, particularly rich in chemical rays. It occurs extensively distributed throughout the mineral kingdom, and is also present in small quantities in animal and vegetable organisms. Atomic weight, 24.41. Symbol, Mg. Sp. gr., 1.75. heavy m. carbonate. A preparation made by precipitating a solution of m. sulphate with sodium carbonate and drying the precipitate [Br. Ph.]. liquor magnes i i bicarb on at is. Solution of bicarbonate of m.; made by di olving extemporaneously prepared basic m. carbonate in water charged with carbon dioxid. It contains about 10 grains of the bicarbonate to the fluid ounce [Br. Ph.]. liquor magnes i i citratis. Commonly called "citrate of magnesia." A preparation made by introducing pota ium bicarbonate into an acid solution of m. citrate and syrup of lemon and sealing hermetically [U. S. Ph.]. m. ammonium phosphate. MgNEUPCu, an insoluble white substance, present in urinary calculi and often deposited in alkaline urine. Crystallizes in starlike crystals. m. borocitrate. A mixture of m. borate, m. citrate, and borax, magnes i i carbon as [U. S. Ph.], magnes i i carbon as levis [Br. Ph.]. See m. carbonate. magnes i i carbon as pond eros us. See heavy m. carbonate [Br. Ph.]. m. carbonate. MgCC>3, an insoluble white substance. The magnes i i carbon as of the U. S. Ph. is (MgC03)4Mg(OH)2 + sH30, a mixture of m. carbonate and m. hydroxid. It is an anti-acid and a mild purgative. magnes i i citras. See m. citrate, magnes i i citras effervescens. A preparation of m. carbonate, citric acid, and water enough to form a paste; this mixture (forming a m. citrate), is then dried, powdered, mixed with sodium bicarbonate, sugar, and citric acid, dampened with alcohol and rubbed through a coarse sieve, so as to form a coarsely granular powder [U. S. Ph., 1890]. m. citrate. The m. salt of citric acid or a mixture of citric acid and m. carbonate, which has been moistened with water or alcohol and then dried. Used as a purgative, m. fluorid. MgF2, a white powder, used as an antiseptic, m. glycerinophosphate. The m. salt of glycerophosphoric acid, CsHiOsPOsMg. A nerve tonic. m. ichthyolate. A mixture of m. oxid and ichthyol. m. lactate. The m. salt of lactic acid (CH3.- CHOH.COO)2Mg. A white substance, used as a laxative, m. oxid. MgO, a white powder formed by heating m. carbonate, m. phosphate. Mg3(POs)2, a white insoluble substance, present in many plants and found at times in urinary calculi, m. salicylate. The m. salt of salicylic acid, Mg(C6H4(OH)COO)2, a white crystalline substance, used in typhoid fever, magnes i i sulphas. See m. sulphate [U. S. Ph., Br. Ph.]. m. sulphas effervescens. Effervescent m. sulphate, a granular salt of sodium bicarbonate and of citric and tartaric acids. It is a laxative [U. S. Ph.]. m. sulphate. Syn.: Epsom salts. MgSCU + 7H2O; a bitter salt, readily soluble in water. Used as a mild purgative, m. sulphite. MgSGv + 6H20; an antiseptic, solution of bicarbonate of m. See liquor magnes i i bicarb on at is. [Br. Ph.]. solution of citrate of m. See liquor magnes i i citratis [U. S. Ph.].