ANTIMONY OXIDE 213 



SbOa 4- NagSbSg f 2 HoO. Strain and add sulphuric acid 

 to the hot liquor as long as precipitation occurs. NaSbOj + 

 Na3SbS3 + 2 H,SO, = 8hA + 2 Na,SO, + 2 H,0. 



Properties. — An amorphous, reddish-brown powder, 

 becoming lighter in color on exposure to the light, and 

 having neither odor or taste. Insoluble in water or alcohol. 



Golden Sulphur. (Non-official.) 



A yellow, insoluble powder, is another compound of 

 antimony, consisting of a mixture of antimony trisulphide 

 and trioxide. 



Dose. — Neither kermes mineral nor golden sulphur are 

 suitable for internal use. The dose would be twice or 

 thrice that of tartar emetic. 



Antimonii Oxidum. Antimony Oxide. Sb^Oj. (U. S. P.) 

 {Antimony Trioxide.) 



Derivation. — Pour a solution of chloride of antimony 

 into water. The oxychloride of antimony is precipitated. 

 Sb CI3 + H,0 = Sb O 01 + 2 H 01. 



The precipitate is treated with carbonate of sodium, 

 and the result is washed and dried. 2 Sb O 01 + Nag 0^ 

 = Sb, O3 + 2 Na 01 + O,. 



Properties. — A heavy, grayish-white powder, without 

 odor or taste, and permanent in the air. Almost insoluble 

 in water and insoluble in alcohol. 



Dose. — Would be twice that of tartar emetic, but the 

 oxide is inappropriate for internal use. 



Antimonii et Potassii Tartkas. Antimony and Potassium 

 Tartrate. 2 K (Sbo) 0,H,Oe + H,0. (U. S. P.) 



Synonym. — Antimonium tartaratum, B.P.; tartar emetic, 

 tartarated antimony, tartarus emeticus, stibio-kali tartaricum, 

 E.; antimonii potassio-tartras, antimonium tartarizatum, 

 tartarus stibiatus, P.G.; tartrate de potasse et d'antimoine 

 emetique, tartre stibie, Fr.; brechweinstein, G. 



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