Acidum Hydrobromicum Dilutum. Diluted Hydrobromic Acid. A liquid compound of 10 per cent., by weight, of absolute Hydrobromic Acid (HBr=80.76) in water.


Potassium Bromide, in solution, is mixed with Sulphuric Acid, and Potassium Sulphate allowed to crystallize, the precipitate is washed upon the filter and the filtrate is distilled nearly to dryness and then diluted to the proper strength. 2KBr+H2So4=2HBr+K2So4.


A clear, colorless liquid, having a strongly acid taste. Sp. gr., about 1.077.

Dose, 1/2 to 1 fl. dr.; 2. to 4. c.c.

Action and Therapeutics of Hydrobromic Acid

The action of this acid appears to be the same as that of the bromides of the alkaline metals, but it is very rarely used for the same purposes. It has been employed with occasional success to relieve noises in the ears, and it is said to prevent the symptoms of poisoning by quinine; of this drug it is an excellent solvent.