Characters. - In thin, transparent scales of a deep red colour, slightly sweetish and astringent in taste. It feebly reddens litmus paper.

Solubility. - It is soluble in water, but almost insoluble in rectified spirit.

Reactions. - Heated with solution of potash it evolves ammonia and deposits peroxide of iron. The alkaline solution from which the iron has separated does not, when slightly supersaturated with acetic acid, give any crystalline deposit (distinction from and absence of tartrate).

Dose. - 5 to 10 grains.

Preparations.

B.P.

Dose.

Vinum Ferri Citratis. 8 grains in 1 fl. oz. of orange wine.......................

1-4 fl. drs.

U.S.P.

Ferri et Strychninae Citras ............................................................................

Liquor Ferri et Quininae Citratis ..................................................................

Vinum Ferri Citratis......................................................................................

1-2 fl. drs.

U.S.P. Vinum Ferri Citratis. (Citrate of iron and ammonium, 4; tincture of sweet orange-peel, 12; syrup, 36; stronger white wine, 44.)