210 INOBGANIO AGENTS 



deutoioduretum (biniodidum) liydrargyri, mercurius iodatus 

 ruber, idaretum hydrargyricum, E.; deut-iodure (bi-iodure) 

 de mercure, iodure mercurique, Fr.; rothes jodquecksilber, 

 quecksilberjodid, G. 



Derivation. — Mix aqueous solutious of corrosive mercuric 

 chloride, 40gm., and potassium iodide, 50gm. The red 

 iodide is precipitated. Filter, wash and dry. HgCIj + 2 KI 

 = Hgl, + 2 K CI. 



Properties. — A scarlet-red, amorphous powder ; odorless 

 and tasteless ; permanent in the air ; almost insoluble in 

 water ; soluble in 130 parts of alcohol. 



Unguentum Hydbakgybi Nitbatis. Ointment of Mercuric 

 Nitrate (Citrine Ointment). (U. S. & B. P.) 



Mercury, 70 gm.; nitric acid, 175 gm.; lard oil, 760 

 gm. (U.S.)_ 



Properties. — A lemon-yellow ointment. 



Hydeabgyeum Ammoniatum. Ammoniated Mercury. NHj 



HgCl. (U.S.&B.R) 



( WJiite Precipitate, Mercuric Ammonium Chloride.) 



Synonym. — Hydrargyrum prsecipitatum album, P. G.; 

 hydrargyrum amidato-bichloratum (ammoniato-muriaticum), 

 hydrargyri ammonio-chloridum, mercurius prsecipitatus 

 albus, E.; oxychlorure ammoniacal de mercure, mercure pre- 

 cipite blanc, Pr.; weisse quecksilber-pracipat, quecksilber- 

 chloridamidid, G. 



Derivation. — Mix an aqueous solution (1-20) of corrosive 

 mercuric chloride, 200, with ammonia water, 15. 



HgCl, + 2 NH.OH = NH, Hg CI + NH.Cl + 2H,0. 

 Filter, wash with diluted ammonia water (1-20), and dry the 

 precipitated ammoniated mercury. 



Properties.— Whiie, pulverent pieces, or a white, amor- 

 phous powder, without odor, and having an earthy, after- 

 wards styptic and metallic, taste ; permanent in the air ; 

 almost insoluble in water or in alcohol. 



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