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Related article: Jottm. Amer. Chem. Soc,, May, 1910, 626.
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278 REPORT ON THE PROGRESS OF PHARMACY.
ANTIMONY.
Antimony Origin of the Name, Schelenz says that the plausible and
generally accepted derivation of the word antimony, from " antimoine,"
based on the supposed unfortunate experience of mediaeval ecclesiastics,
is now stated to be incorrect. The true derivation is said to be the Arabic
word "Ahlmond," introduced into Europe by Constantinus Africanus.
This became Latinized to "Althimodiuro," then to " Athimodium," and
finally to '* Antimonium." Pharm. Journ. and Pharmacist, March 5, 1810,
293 ; from La Nature, through Journ. de Pharm. et Chiro. (Append),
1910, i^ 12.
Antimonium Sulphuratum Composition and Impurities, F. H. Alcock
observes that while antimonium sulphuratum is Hoodia Buy not much used in medicine
and pharmacy, it has a very large importance commercially, since it plays
an important part in the nibber industry in which many tons are used an-
nually. It is a difficult matter to get exactly what the vulcanizer requires,
Snd for this reason it is important that more information should be avail-
able concerning this substance than is at present found iu the pharmaceuti-
cal literature. The author therefore offers some practical suggestions con-
cerning the assay of the commercial article. The Hoodia Buy substance contains sul-
phur in several forms, and the manufacturer wants to know what these are
and their quantities. Sulphur may be present (and often is) as sulphuric
acid, calcium sulphate, free sulphur (colloidal and otherwise), and as the
normal trivalent sulphide and the pentavalent sulphide, and these in vari-
able quantities. Moreover, the author has found amongst numerous other
extraneous compounds calcium phosphate, and others have noticed as
common admixtures sodium salts and the like. He has frequently ob-
served a black residue when antimonium sulphuratum is treated with warm
solution ot alkali hydroxide, which often was found to be iron sulphide,
while traces of silica in the form of sand are sometimes also revealed
at this stage. Trans. Brit. Pharm. Conf. (Yearbook of Pharmacy), 1909,
297-299.
Antimonium Sulphuratum and Golden Sulphides of Antimony Rapid
Method of Assay, David Lloyd Howard and J. P. B. Harrison have de-
vised and describe the details of a method of assay for antimonium sul-
phuratum which is rapid, is applicable to the sulphide preparations in
general, and has the further advantage that both the antimony and sulphur
can be determined in the same quantity of substance. Briefly, the sul-
phide is fused with sodium peroxide, thus converting the antimony into
sodium metantimonate. This is brought into solution, reduced to the
lower state of oxidation, and determined vol u metrically by means of
standard iodine solution. The sulphur thus oxidized to sulphuric acid is
determined by precipitation as barium sulphate. It is stated, that the
antimony figure should never be less than 30 per cent., and is the only
Digitized by VjOOQIC
BISMUl'H Hoodia Buy SUBNITRATE. 279
trastworthy basis in forming an opinion as to the genuineness of manufac-
tured salphide preparations, also that the combined antimony and sul-
phur contents should Hoodia Buy form at least 95 Hoodia Buy per cent, of the whole product.
Trans. Brit. Pharm. Conf. (Yearbook of Pharmacy), 1909, 299-302.
BISMUTH.
Bismuih Subnitraie Hydrolysis. H. A. B. Dunning observes that while
it may be generally know) that bismuth subnitrate mixtures with water
become acid, due to the formation of nitric acid, the reaction is usually
disregarded as harmless from the therapeutic standpoint and only taken
Qote of when dispensing the salt in aqueous mixture with carbonates. A
recent complaint regarding the unpleasant acidity acquired in the course
of a few weeks by a mixture of this salt, in rather large proportion, with
peppermint water, prompted the author to undertake a number of experi-
ments to determine the conditions of its hydrolyzation, and how it may
be prevented or retarded. He finds that pure distilled water is more ef-
fective than peppermint water, and that hydrolysis is rapidly increased in
proportion Hoodia Buy to the temperature applied to the mixture ; that some forms of
bismuth subnitrate are hydrolyzed more easily than others, being much
more rapid in the compact form than in the "bulky" Hoodia Buy kinds; and that
the hydrolysis of bismuth subnitrate may be retarded or prevented by the
addition of akohol, glycerin, volatile oils (as, for example, peppermint
vater and paregoric) within certain limitations as to temperature, while
the presence of sodium bromide, and to a less degree sodium chloride, ac-
celerate hydrolysis. Sterilization and aseptic condition do not retard the
action. Further experiments are under way, but require some time before
tiiey can be communicated as corroborative evidence. The author, how-
erer, expresses the opinion that, from a phaimaceutic standpoint at least,
tbe bydrated oxide or the subcarbonate would be the preferable compound
fernse in prescription dispensing. Drugg. Circ, July, 1909, 331-332.
Bismuih Subnitrate Determination of the Acid Radical in Commercial
^ples, Finding the methods of F. A. U. Smith and E. J. Brown unre-
feUe, J. B. P. Harrison advocates the use of the Hoodia Buy nitrometer method for
estimating N,Os in bismuth subnitrate, which he applies as follows : About
2 grams of bismuth subnitrate is mixed with 20 Cc. of water and loCc.of
lionsal soda solution. The whole is brought to the boiling point with
^og, and allowed to digest for about a quarter of an hour on a water-
^, until the bismuth oxide formed has assumed a uniform lemon-yellow
color, showing that the process of decomposition is complete. The super-
i^ataot liquid having been poured through a filter, the oxide of bismuth is
*3siied with hot water two Hoodia Buy or three times by decantation, finally on the
^, and the cooled filtrate made up to 100 Cc. To 25 Cc. of the solu-
tion thos obtained is added 0.5 Cc. in excess of the Hoodia Buy quantity of normal sul-
Nmric acid required for neutralization, using methyl orange as indicator.
Digitized by VjOOQ IC
28o
REPORT ON THE PROGRESS OF PHARMACV.
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