Ammonii Benzoas - Ammdnii Benzoatis - Ammonium Benzoate (U. S. P.). - Origin. - Dissolve benzoic acid in water of ammonia and distilled water, evaporate, and crystallize. It should contain not less than 98 per cent. of pure ammonium benzoate, C6H5.COONH4.

Description and Properties. - Thin, white, four-sided laminar crystals; odorless, or having a slight odor of benzoic acid; a saline, bitter, afterward slightly acrid taste, and gradually losing ammonia on exposure to air. Soluble, at 25o C. (77o F.), in 10.5 parts of water, in 25 parts of alcohol, in 1.2 parts of boiling water, and in 7.6 parts of boiling alcohol. The salt is neutral or has a very slight reaction upon litmus-paper. It should be kept in well-stoppered bottles.

Dose. - 10-20 grains (0.6-1.2 Gm.) [15 grains (1 Gm.), U. S. P.].