Characters. - A white powder, with a faintly acetous odour.

Solubility. - Soluble in water and in spirit.

Keactions. - Potash or soda gives a precipitate soluble in excess, and exhibiting the reactions of morphine, U.S.P. When sulphuric acid is added to the salt, acetous vapours are evolved. When freshly prepared it is soluble in 12 parts of water at 15° C.

Preparation. - Obtain morphine by precipitating it from the hydrochlorate by ammonia, dissolve it in acetic acid and crystallise, B.P. In the U.S.P. morphine is officinal, and requires only to be dissolved in acetic acid.

Preparations. U.S.P. None

B.P.

Dose.

Liquor Morphinae Acetatis.........................

4 gr. in 1 fl. oz., or 1 per cent....

60 min.

Injectio Morphinae Hypodermica,

1 gr. in 10 min.....................................

1-5 min.

or more.

liquor Morphinae Acetatis. Solution of Acetate of Morphine. - It is prepared like the solution of the hydrochlorate, using the acetate of morphine and acetic acid.

Injectio Morphinae Hypodermica. Hypodermic Injection of Morphine. - A solution of acetate of morphine, containing 1 grain of the acetate in 10 minims of the injection. Acetate of morphine is freshly prepared by precipitating morphine from a solution of 92 grains of hydrochlorate of morphine in 2 ounces of warm distilled water, with sufficient ammonia to render the solution alkaline. The morphine is washed on a filter, dissolved in about an ounce of distilled water with the addition of acetic acid, and the use of gentle heat, until the whole of the morphine is dissolved and a slightly acid solution formed. Enough distilled water is now added to make up the solution to 2 fluid ounces exactly. It is then filtered, and kept from the light in a stoppered bottle.1