232 INORGANIC AGENTS 



a stimulant and antiseptic inhalation, which is produced by 

 adding one-half a drachm of iodine to the pint of boiling 

 water. 



Uses Internal. — Iodine is thought to act more satisfac- 

 torily than potassium iodide in the treatment of diabetes- 

 insipidus or polyuria of the horse, in which it often appears 

 to be a specific. 



Administraticm. — Iodine may be combined with gentian 

 and iron in the form of a ball, as recommended by Finlay 

 Dun, or better, as Lugol's Solution, which is less irritating 

 and more active. 



PoTASSii loDiDUM. Potassium Iodide. K I. (U. S. & B. P.) 



Synonym. — Jodkalium, G. 



Derivation. — Iodine is dissolved in hot liquor potassae. 

 6I4-6KOH =5KI+KI03 + 3 HA The evapo- 

 rated residue is heated .with charcoal to remove O from K I 

 O3 (Potassium lodate). KIO3 + 3 C = KI -h 3 C O. The 

 result is purified by crystallization. 



Properties.— Potassium iodide occurs in colorless, trans- 

 parent or translucent, cubical crystals ; or as a white, gra- 

 nular powder, having a slight odor of iodine, and a bitter, 

 saline taste. Permanent in dry air, but slightly delique- 

 scent in moist air. It is soluble in 0.75 part of water; in 18 

 parts of alcohol, and 2.5 parts of glycerin. 



i>ose.— H., 3ii.-iv. (8.-15.); C, 3vi. (24); Sh. & Sw., 

 gr.xv.-xxx. (1.-2.); D., gr.ii.-x. (.12.6). 



PREPARATION. 



Unguentum Potassii Iodide (12 per cent.) (XJ. S. P.) 

 Unimportant in veterinary practice, 



SoDii loDiDUM. Sodium Iodide. Na I. (U. S. & B. P.; 



Synonym. — lodure de sodium, Fr.; jodnatrum, G. 

 Derivation. — Made from sodium hydrate in the same 

 manner as potassium iodide. 



