155 
AMMONII BENZOAS. 
Smith, F. A. Upshur, points out that ammonium benzoate grad- 
ually loses ammonia on exposure to air. — Pharm. J., Lond., 1906, 
v. 22, p. 63. 
Coblentz, Virgil, says the solubility of this salt varies according 
as it is of neutral or acid reaction ; the latter condition is more usual 
because of the readiness with which the salt loses in ammonia gas on 
standing. — Am. J. Pharm., Phila., 1906, v. 78, p. 391. 
Sayre, L. E., reports that one sample of ammonia benzoate exam- 
ined was soluble in about 200 parts of water, in place of 10.5 parts 
as the U. S. P. VIII requires. He believes that this sample had 
been very poorly kept. — Bull. Kansas Bd. Health, 1906, v. 2, p. 173. 
AMMONII BROMIDUM. 
Caspari, Clias. £., reports three samples examined: One U. S. P., 
two contained excess of chloride. — Proc. Missouri Pharm. Ass., 1906, 
p. 101. 
Gane, E. H., found ammonium bromide to be 96.4. 98.5, 99, 98.5 
per cent pure. — Proc. Am. Pharm. Ass., 1906, v. 54, p. 333. 
AMMONII CARBONAS. 
Coblentz, Virgil, says that the U. S. P., 1890, standard of 100 per 
cent was difficult to comply with; with the improvements made re- 
cently, the standard of 97 per cent is not difficult to maintain. — Am. 
J. Pharm., Phila., 1906, v. 78, p. 391. 
Smith, F. A. Upshur, points out that ammonium carbonate, on 
exposure to air becomes opaque, losing ammonia and C0 2 , the final 
product being a white powder which consists chiefly of ammonium 
bicarbonate. — Pharm. J., Bond., 1906, v. 22, p. 63. 
The Ph. Brit. Committee of Reference in Pharmacy suggests that 
ammonium carbonate have slightly lower volumetric test require- 
ments. — -Chem. & Drug., Lond., 1906, v. 69, p. 862. 
Macleod and Haskins present a contribution to our knowledge of 
the chemistry of carbamates in which they report an exhaustive 
study of the relation of the carbamate content of freshly prepared 
solution of ammonium carbonate of varying strength. (J. Biol. 
Chem., v. 1.) — Biocliem. Centralbl., Leipz., 1906, v. 5, p. 318. 
Patch, E. L., reports finding ammonium carbonate 94.59 to 97.93 
per cent pure. — Proc. Am. Pharm. Ass., 1906, v. 54, p. 333. 
Tyrer, Thomas, reports on a bulk sample of “ ammonium carbon- 
ate ’* of foreign origin which on anaylsis proved to be chiefly ammo- 
nium bicarbonate and to contain only 21.8 per cent of ammonia, 
showing a deficiency, according to Ph. Brit, standards, of 35 per 
cent. — Pharm. J., Lond., 1906, v. 23, p. 478. 
