Characters. - White foliaceous satiny masses, very deliquescent.

Reactions. - With a watery solution, tartaric acid causes a crystalline precipitate (potassium), sulphuric acid the disengagement of acetic acid, and a dilute solution of perchloride of iron strikes a deep red colour (acetate).

Impurities. - Acid, carbonate, lead.

Tests. - Neutral to test paper (no acid); almost entirely soluble in rectified spirit (no carbonate). Its solution is unaffected by sulphide of ammonium (no metals).

Dose. - 0 to 60 grains.

Preparation in which Acetate of Potassium is used. Tinctura Ferri Acetatis.

Uses. - From its slight local action and its great solubility it produces little effect directly on the stomach and is easily absorbed into the blood. Here it is converted into carbonate and renders the blood and the secretions which come from it more alkaline. This salt of potassium is one which is very frequently used for the purpose of rendering the urine alkaline. It is one of the most powerful saline diuretics we possess, and is much used in dropsies, alone or combined with other diuretics, or with tonics and stimulants, e.g. acetate of iron and acetic ether.

When given in large doses (120 grains and upwards) and in a concentrated form it acts as a purgative.

It is employed, like other potassium salts, as an alterative in acute rheumatism, skin diseases, and enlarged glands.