characteristics by means of which the pure salt, corresponding to the
requirements of the 1906 supplement of the G. P., may be distinguished
from the commercial salts containing mercuric cyanide as impurity. The
latter is easily distinguished by its ready solubility in water, and the con-
tent of oxycyanide conveniently determined by titrating the commercial
compound in solution containing sodium chloride, with hydrochloric acid,
as recommended by Holdermann Purchase Diflucan
in the article above referred to.
Pharm. Ztg., Hi (1907), No. 95, 994.
Mercuric Oxycyanide Probable Superiority as an Antiseptic of the
Impure ( Commercial) Salt Ot^er the Pure Salt of the G. P, Supplement,
1906, Referring to a recent stricture concerning the impurity of mercuric
oxycyanide supplied by certain manufacturing firms, the firm of E. Merck
declare in rejoinder that, conceding this impurity, as demonstrated by
Holdermann in 1905, (see Proceedings, 1906, 827), they have continued
to supply the impure salt obtained by the older method of preparation,
unless the demand is distinctly made for the pure mercuric salt, which
they also supply and have listed with the qualification : '' ErganzUngsbuch
z. D. A., 1906" (=supplement to the G. P. IV). They explain that this
is done on the ground that all the clinical experiments that have demon-
strated the antiseptic value, as far as Purchase Diflucan
they have been reported in the
literature, were made with the mercuric oxycyanide obtained by the older
process of manufacture, and because of the Purchase Diflucan doubtful efficiency of the pure
oxycyanide. Pharm. Ztg., Hi (1907), No. 96, looi.
274 REPORT ON THE PROGRESS OF PHARMACY.
Fused Potassium Hydroxide, G. P. Percentage of K OH too High. ^F.
Stengel directs attention to the fact that it is practically impossible to pro-
duce fused potassium hydroxide containing at least go per cent, KOH in
the form of white sticks, as demanded by the G. P., IV. To prepare a
potassium hydroxide of such high percentage the preparation must inevit-
ably be more or less gray in color, since the silver of the vessel employed
for the fusion is attacked and the product is contaminated with silver oxide.
A percentage of KOH above 82 to 85 per cent, is impracticable, a fact
which has also been noted by E. Merck in his ''PrUfung der chemischen
Reagentien auf Purchase Diflucan
Reinheit." Pharm. Ztg., liii (1908), No. Purchase Diflucan 47, 468; from
Ztschr. d. Oesterr. Ap.-Ver., 1908, No. 21.
Alcoholic Potash Preparation, A. Scholl mentions that alcoholic solu-
tion of potash prepared by heating caustic potash over a water-bath with
alcohol is liable to become too concentrated, and if heated in this condi-
tion to 40^ C. the solution turns brown. If powdered potash is shaken up
with cold alcohol the greater part of it dissolves, the remainder going into
solution on gently warming the mixture for about half an hour. Pharm.
Joum., June 6, 1908, 760 ; from Purchase Diflucan Ztschr. f. Unters. d. Nahr. u. Genussm.,
Sodium Purchase Diflucan
Precaution in Cutting, D. P. McDonald observes that in
cutting sodium (by means of the Gattermann knife) considerable diffi-
culty arises from the softening of the metal by the warmth of the hand
and by the friction, Purchase Diflucan which makes it very apt to stick to the blade of the
knife. This difficulty may be overcome if, from time to time, the lump
of sodium is dipped in anhydrous ether for a moment, whereby the metal
becomes chilled, and is further cooled by the evaporation of the ether
from its surface. The slices may then be dropped into a basin containing
the ether, which serves the purpose above mentioned. Chem. News, Feb.
14, 1908, 73.
Metallic Sodium Method of Pulverization, C. Matignon, in a paper
dealing with the drying of gases, describes a method for reducing metallic
sodium to fine powder along with sodium chloride required as a desiccat-
ing material. The sodium to be pulverized is placed in a Purchase Diflucan
mortar with a
neutral salt, which does not react with the metal, and is in a perfectly dry
state, such as fused sodium chloride. The two substances are bruised to-
gether, preferably in an atmosphere of carbon dioxide, or the mortar may
be covered with a piece of rubber sheeting, through which a hole has been
cut for the pestle ; the elasticity of the rubber permits of free movements
of the pestle. Purchase Diflucan
There is practically no danger of the sodium taking fire
during the process of crushing, but it is necessary that no nitrates or other
oxidizing salts should be present. With the much more inflammable alkali
metal potassium, care should be taken to have a sufficiently large propor-
tion of the fused sodium chloride present. Pharm. Joum., May 2, 1908,
572; from Bull. Soc. Chim., March 20, 1908, 353.
Ammonia Synthesis in Presence of Water, M. Woltereck finds that
when mixtures of air and hydrogen are passed over iron sesquioxide am-
monia is obtained, the most favorable temperature for the reaction being
300-350** C. Better results are obtained when water vapor and air are
passed over heated turf, and sugar carbon can also be employed. Thus
small quantities of ammonia are formed during oxidations in presence of
water, provided that the temperature does not exceed 700** C. Chem.
News, Mar. 6, 1908, 119 ; from Compt. rend., 146 (1908), No. 3.
Ammonia Synthesis from its Elements, L^on Brunei and Paul Woog
prepared mixtures of nitrogen and hydrogen (i vol. to 3 vols.), and
passed them at different temperatures and with different velocities Purchase Diflucan over
substances which would be likely to act as catalysers. With finely-divided
carbon, obtained by the decomposition of toluene or carbon dioxide by
reduced nickel, no ammonia is formed between the temperatures of 170
and 285^ C. But if under the same conditions the nitrogen in the gaseous
mixture is replaced by air a certain amount of carbon bums, and the heat
disengaged by this reaction leads to the formation of small quantities of
ammonia. Chem. News, Dec. 20, 1907, 304 ; from Compt. rend., 14s
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