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DENTAL MEDICINE.
374
For Odontalgia.
U . Creasoti,
Chloroformi,
Morphinse hydrochloratis iiii H "J
Tinctura benzoini 5J. M.
SiGNA.—To be applied, on a pellet of cotton, to carious cavity. (See formulae
of Carbolic Acid.)

GuAiACOL is a derivation of wood creasote, in the form of an
oily liquid with an odor of cassia and resorcin.
The liquid guaiacol found in commerce is far from being
a chemically pure product. It is a mixture of cresylol, guaiacol
and creasote in varying proportions. It may contain 50 per cent,
guaiacol, but sometimes it contains no more than 20 or even 10
per cent. Pure guaiacol is in the form of hard, white rhomboidal
crystals, almost insoluble in water, but soluble in alcohol, in oil,
and in anhydrous glycerine.
The taste of guaiacol is slightly sweetish, with a pungent and
burning after-taste. The chief effects of poisoning with pure
guaiacol are, agitation and then enfeeblement with retardation of
the heart's action, and of the breathing. Most of the secretions,
and especially the lachrymal, are increased in quantity. Death
occurs during coma. Synthetic guaiacol has been administered
in various stages of consumption, taken immediately before eat-
ing. Large doses may cause vomiting.
The oily liquid possesses the active principle of creasote, and
the power to destroy microbes in the human mouth. It is
claimed to possess the same therapeutic value as creasote and to
be a better disinfectant, especially in cases of decomposed pulps.
" Guaiacol may be sealed up in a pulp cavity from one to three
months or more, and the contents be found perfectly disinfected."

CREOLIN—CREOLINE—KREOLIN.
Creolin is a liquid cresol, a product of the decomposition of
coal tar.
Derivation.—It is obtained from English pit-coal by distilla-
tion, and is in the form of a brownish, syrupy liquid, complex