Contractions. - Kali-i. K-hy.

Present name. - Potassic Iodide. KI.

Iodide of Potassium.

This may be obtained from the manufacturing chemists, and purified by solution in distilled water and re-crystallization.

Characters and Tests. - In colourless, generally opaque, cubic crystals, readily soluble in water, and in a less degree in spirit. It commonly has a feeble alkaline reaction; its solution mixed with mucilage of Starch gives a blue colour on the addition of a minute quantity of solution of Chlorine. It gives a crystalline precipitate -with Tartaric Acid. The addition of Tartaric Acid and mucilage of Starch to its watery solution does not develop a blue colour. Solution of Nitrate of Silver added in excess forms a yellowish-white precipitate, which, when agitated with Ammonia, yields by subsidence a clear liquid in which excess of Nitric Acid causes no turbidity. Its aqueous solution is only faintly precipitated by the addition of Saccha-rated Solution of Lime.

Preparation. - Solution in dilute alcohol for 1x and then in rectified spirit.

Reference to Horn. Proving. - Hartlaub and Trinks.

Proper forms for dispensing. - lx, Solution only. 1 and upwards, Tincture, Pilules, or Globules.