BENZOINUM. BISMUTHI SUBCARBONAS. 19 



Heat a few fragments in a test-tube, and note the character of the sublimate 



The compound tincture is frequently used as an inhalant in steam for the treat- 

 ment of acute laryngitis. 



The official preparations containing Benzoin are: Adeps Benzoinatus, Tinctura 

 Benzoini, Tinctura Benzoini Composita. 



BENZOSULPHINIDUM. 



Saccharin is "the anhydride of ortho-sulphamide-benzoic acid" ; it is a laboratory 

 product of toluene. 



Properties: 



Appearance 



Color 



Odor .. 



Taste, 1 to 10,000 sol. 



Solubility : 



Cold H 2 O .... 



Hot H 2 O 



C 2 H 5 OH ... 



NH 4 OH 



Add 0.06 Gm. citric acid to a i to 10,000 solution Saccharin, and compare relative 



sweetness with that first tasted 



Incinerate 0.008 Gm. Saccharin. What odor evolved? 



Benzosulphinide is used as a substitute for sugar in cases of diabetes, but fre- 

 quently is not tolerated very long. 



The official Sodii Benzosulphinidum is more soluble. 



BISMUTHI SUBCARBONAS. 



Bismuth Subcarbonate is obtained by the interaction of ammonium carbonate and 

 purified bismuth nitrate. It is rather variable in chemical composition. 



Properties: 



Appearance Taste .... 



Feel .. 



Color 



Odor 



Solubility : 

 H 2 O ... 



C 2 H 5 OH 



Incompatibilities: Add some Bismuth Subcarbonate to 



HC1, T. S. .. 

 KOH, T. S. 



KI, T. S. 



Ac. Tan., T. S 



Bismuth Subcarbonate is used chiefly for its protective coating effect in inflam- 

 mations of the intestinal mucosa. Dose, 0.5 Gm. 



