Ammonium, Benzoate of

Prep. 1. Di olve benzoic acid in ammonia solution to saturation, then further add ammonia in slight exce , and crystallise by refrigeration, or in vacuo. 2. ( Liquid ; Solu′tio ammon iæ benzoa′tis , L.) As the last, but without evaporating the solution. Prop., . Very soluble and very difficult to crystallise. If the solution is boiled for a short time and then abandoned to spontaneous evaporation, crystals of ACID BENZOATE OF AMMONIUM are deposited. It is used chiefly as a chemical test; but has been recently recommended in chronic bronchitis, old coughs, .; and to check the formation of chalk-stones and urinary calculi.— Dose , 10 to 15 gr.; (of the solution) 15 drops to 1 fl. dr., or more. See Benzoic Acid .