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520 DENTAL MEDICINE. —
POTASSIUM BICARBONAS—BICARBONATE OF POTASSIUM.
Formula.—KHCO^.
Derivation.— Bicarbonate of potassium is obtained by passing
carbonic acid through an aqueous solution of carbonate of potas-
sium, until it is completely saturated. The solution is then
filtered and evaporated, the product being bicarbonate of potas-
sium, in the form of transparent, colorless crystals, of the shape
of irregular eight-sided prisms. It is inodorous, with a saline
and somewhat alkaline taste, and is soluble in water, but in-
soluble in alcohol. Its incompatibles are acids and acidulous
salts, etc.
Medical Properties and Action.—Bicarbonate of potassium is
antacid, diuretic and antilithic. In large quantities it is a cor-
rosive poison.
Therapeutic Uses.— It is employed internally in acute rheuma-
tism, gout, and uric acid lithiasis, diseases of the skin, calculous
affections, etc., etc.
Dose.—Of bicarbonate of potassium, gr. v to 3j.
Dental Uses.—Bicarbonate of potassium is employed in dental
practice as an antacid, a solution being serviceable as a mouth
wash, to prevent injury to" the teeth from acid medicines.
DENTAL FORMULAE.
/"or A^euralgia. For Facial A^euralgia,
J. E. GARRF.TSON. ^^^^
R . Ferri sulphatis exsic,
„..,.. — R. Potassii bicarb. . tss
^
rotassn carbonatis aa gr.ccl ,
c • nr Ext. ergotae fluidi f^j
«'•'
*'
Syrup acaciae . . q.s. M.
•n-. 1 M , Infusi ergotse . .f5vi. M.
=•
Ft. pil. No. lOO. £> "
SiGXA.—Begin with 3 a day and in- Signa.—Two tablespoonfuls every 4
crease to 6; take several hundred. hours.
POTASSIUM AND SODIUM—KALIUM-NATRIUM.
A compound or alloy of potassium and sodium kalium-natrium^
in the form of a soft, almost semi-fluid mass prepared by Dr. Emil
Schreier, and employed for the treatment of putrescent pulp-
canals. Dr. Schreier claims that when these two alkali metals
are inserted into the pulp-canal they come in contact with a