Ammonium, Bromide of

NH 4 Br. Syn. Ammo′′nii bromi′dum , A. bro′mis , L.; Hydro bromate d’ammonia que , Bromure d’ammonium , Fr. A salt which is obtained from hydrobromic acid, bromide of iron, ., by similar proce es to those adopted for the iodide. The following proce for the preparation of bromide of ammonium is from the formula for the new medicaments adopted by the Paris Pharmaceutical Society: “Add bromine very slowly to a solution of ammonia, with continual stirring, until the liquid remains faintly and persistently coloured by a slight exce of bromine.” It forms white prismatic crystals; and, in its general properties, resembles bromide of pota ium. It is volatile, and easily decomposed. Used as a nervine in hysterics; especially useful for sleeple ne where there is no organic disease; given in epilepsy when bromide of pota ium fails.— Dose , 2 to 20 grains.