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BICARBONATE OF SODIUM. 547

a preventive of cholera, in plagues, cholera infantum, etc. ; ex-
ternally, it is a valuable styptic in local hemorrhage, and as a
dressing for wounds, burns, chilblains, excoriations, varicose
veins, venomous stings and bites, and as a disinfectant in throat
affections, leucorrhoea, diphtheria, scarlatina, smallpox, ozasna, etc.
Dental Uses.—Phenate of soda is useful in dental practice, as
an astringent and styptic in hemorrhage following the extraction
of teeth, and to relieve the soreness of such an operation, as it
promotes the rapid absorption of the extravasated blood, and the
healing and hardening of the gums. It is applied on a pellet of
cotton, or in solution with water, and acts as a sedative and an-
tiphlogistic as well as a hemostatic, and has little or no escha-
rotic action. For soft and spongy gums it forms an efficient gargle
or mouth wash, and can be employed for this purpose in its full
strength, in the form of phenol sodique, or diluted with from one
to twelve parts of water. When applied on cotton to an ex-
posed and inflamed pulp, it relieves odontalgia. It is also em-
ployed in aphthous ulcerations of the mouth, and as a disinfectant
in offensive breath, in the proportion of a teaspoonful to a glass
of water.
DENTAL FORMULAE.
Phenol Sodicjue.
R. Pure melted carbolic acid 5 parts
Solution of caustic soda, specific gravity 1 : 332 . . I part
Distilled water 5 parts.
Mix.
A Phenol Sodique Preparation.
R. Acidi carbolici . . gr.clxxxviij
Sodoe caustic gr.xxxj
Aquae ^iv. M.
SiGNA.—To be applied on a pellet of cotton, or as a mouth wash, diluted
to meet requirements of case.
SODII BICARBONAS—BICARBONATE OF SODIUM.
SESQUICARBONATE OF SODIUM.
Formula.—"^^nCOy
Derivation.— Bicarbonate of sodium is obtained by saturating
the carbonate of sodium with carbonic acid. It is in the form