Characters. - In transparent colourless prisms.

Solubility. - Soluble in water, insoluble in rectified spirit. Reactions. - The aqueous solution gives the reactions of ammonia, and of a phosphate (p. 595).

Dose. - 5 to 20 grs. freely diluted.

Uses. - It has been used as a remedy in cases of gout, in order to eliminate urate of sodium from the system, the theory of its action being that it decomposes the insoluble urate of sodium, converting it into soluble urate of ammonium and phosphate of sodium.

Ammonii Bromidum. - Vide p. 556. Ammonii Iodidum. - Vide p. 664.