169 
may be regarded as derivatives of ammonia. These compounds in- 
clude amides, imides, acetyl, and like derivatives of aromatic bases, 
and derivatives of urea. The list includes such well-known substances 
as acetanilide, acetamide, phenacetin, and succinmide. — Pharm. J., 
Lond., 1906, v. 22, p. 231. 
Allain asserts that the stability of solution of hydrogen peroxide 
is much increased by the addition of sodium or of magnesium chlo- 
ride. He prefers sodium chloride, because it not only increases the 
antiseptic power of hydrogen peroxide, but also favors cicatriza- 
tion. — J. de pharm. et de chim., Par., 1906, v. 24, p. 84. 
Allain’s paper is given at length, with table. — Ibid ., pp. 162-165. 
Vanderkleed, Charles E., points out that recent advances in the 
metallic peroxide industry would appear to guarantee the quality of 
hydrogen peroxide solutions. All of the samples examined tested 
about 3 per cent. — Proc. Pennsylvania Pharm. Ass., 1906, p. 122. 
Von Foregger, Richard, asserts that it has been shown by various 
authors that hydrogen dioxide produced by the decomposition of 
calcium peroxide is much more efficient than an equal quantity of 
aqua hydrogenii dioxidi. He also discusses the reactions which take 
place when magnesium peroxide is dissolved in water acidulated with 
citric acid or when sodium perborate is dissolved in water. — Am. 
Druggist, X. Y., 1906, v. 48, pp. 155-157. 
The Ph. Brit. Committee of Reference in Pharmacy report on solu- 
tion of hydrogen dioxide says : 
Magnesium sulphate solution should be used in the gasometric assay, but a 
volumetric process (iodine and thiosulphate or potassium bichromate) would 
be preferable. Tests for limit of free acid and for fluoride should be added. — 
Chem. & Drug., Loud., 1906, v. 69, p. 864. 
Hughes, J. A., finds titration with permanganate solution exceed- 
ingly simple and expeditious. He prepares a solution of potassium 
permanganate 5.62 gm. to the liter, each volume of which is then 
equivalent to an equal volume of oxygen. The number of drachms 
of permanganate solution required will give strength of the per- 
oxide in volumes.— Ibicl., v. 68, p. 211. 
Deniges, G., suggests the use of benzidine acetate as a reagent for 
hydrogen dioxide. — Bull. Soc. de pharm. de Bordeaux, 1906, v. 46, 
pp. 325-327. 
He also points out that the interesting reaction proposed by Barres- 
will for the detection of hvdrogen dioxide bv means of chromates 
may also be applied to the detection of chromates by means of hydro- 
gen dioxide. — Ibid., v. 46, pp. 327-329. 
Havenhill, L. D., found that 5 samples of a 12 bottle lot which 
had assayed O. K. the previous year ranged from 2 to 2.8 per cent, 
or a depreciation of 6.6 to 20 in a year’s time. — Proc. Kansas Pharm. 
Ass., 1906, p. 36. 
