Ill 



in a solution of iodide of potassium or chloride of sodium. 

 Seldom given as pure iodine. 



Impurities. Iodide of cyanogen ; subliming as colourless 

 pungent prisms. Iron; not volatile. Water; as moisture. 

 Deficient iodine ; detected by hyposulphite of soda. 



Incompatible^ . Ammonia, metallic salts, mineral acids, 

 vegetable alkaloids. 



Preparation^. 



a. Linimentum lodi.- Iodine, 5 ; Iodide of Potas- 

 sium, 2 ; Camphor, 1 ; Spirit, 40. 



b. Liquor lodi. Iodine, 20 gr. ; Iodide of Potas- 

 sium, 30 gr. ;* Water, 1 oz. 



c. Tinctura lodi. Iodine, i ; Iodide of Potassium, \ ; 

 Spirit, 20. Dose, 5_to 20 min.^ 



From Tinctura lodi is prepared : 



Vapor lodi. Tincture of Iodine, 1 fl.dr. ; 

 Water, 1 fl.oz. 



d. Unguentum lodi. Iodine, 32 gr. ; Iodide of Po- 

 tassium, 32 gr. ; Spirit, 1 fl.dr. ; Lard, 2 oz. 



From lodum is made : 



Potassii lodidum. See Potassium, for source 

 and HJiaracters. Dose, 2 to 10 gr. or more. 



Preparations. 



a. Linimentum Potassii lodidi cum Sapone. 

 Iodide of Potassium, 1^; Hard Soap, 1; Glycerine, 

 1; Oil of Lemon, | ; Water, 10. 



^.Unguentum Potass ii lodidi. Iodide of 

 Potassium, 64 gr. ; Carbonate of Potash, 4 gr. ; 

 Water, 1 fl.dr. ; Lard, 1 oz. 



y. Also all preparations of lodum. 



Iodine is also used in the production o/the In 

 of Cadmium, Ferrum, Hydrargyrum (2), Plumbum, 

 and Sulphur. 



Solutions of Iodine may be decolorised by Hypo- 

 sulphite of Soda. 



ACTION AND USES. 



1. IMMEDIATE LOCAL ACTIOX AND V- 



Externally applied, iodine is a powerful irritant and vesi- 

 cant, decomposing organic molecules, and entering into loose 



