POTASSIUM IODIDE 247 



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. 



Administration. — 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. 



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



/S^2/nom?/m.^Jodkalium, G. 



Derivation. — Iodine is dissolved in hot liquor potassse. 

 6I-f6KOH=5Kl4-KI03-|-3 H,0. The evapo- 

 rated residue is heated with charcoal to remove from K I 

 O3 (Potassium lodate). KIO3 + 3 = KI 4- 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. 



Dose.—K., 3ii.-iv. (8.-15.); 0., 3 vi. (24.); Sh. & Sw., 

 gr.xv.-xxx. (1.-2.); D., gr.ii.-x. (.12-.6). 



PREPARATION. 



Unguentum Potasaii lodidi. (U. S. & B. P.) 



10 per cent., 17. S. P. 



Unimportant in veterinary practice. 



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

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

 Derivation.— Mshde from sodium hydrate in the sama 

 manner as potassium iodide. 



Digitized by Microsoft® 



