Characters. - In crystals like those of the sulphate, but generally somewhat larger.

Reactions. - It gives the reactions of quinine, and with test solution of nitrate of silver produces a white precipitate insoluble in nitric acid, but soluble in ammonia.

Uses. - Like those of the bisulphate.

Preparation.

B.P.

Dose.

Tinctura Quininae (1 gr. in 1 fl. dr.)..........................................

1/2-2 fl. dr.

U.S.P. Quininae Valerianas. Valerianate of Quinine. C20H24N2O2C5H10O2.H2O; 444.

Characters. - White pearly crystals with a slight odour of valerianic acid, a bitter taste and a neutral reaction.

Reactions. - The solution when acidulated with sulphuric acid emits the odour of valerianic acid, and gives the reactions of quinine.

Use. - As a tonic in hysteria and nervous irritability. It is said to be particularly useful in some forms of intermittent and spasmodic nervous affections (vide p. 952).