British pharmacopoeia / published under the direction of the General Council of Medical Education and Registration of the United Kingdom, pursuant to the Medical act (1858), 1867.

Date:
1877
Catalogue details

Licence: Public Domain Mark

Credit: British pharmacopoeia / published under the direction of the General Council of Medical Education and Registration of the United Kingdom, pursuant to the Medical act (1858), 1867. Source: Wellcome Collection.

    44/504 (page 8)
    gravity is 1-065 ; boiling-point, 370°. The crystals readil}- absorb moisture on exposure to the air, and they are thus liquefied; the acid, however, is but slightly soluble in water, but it is freely soluble in alcohol, ether, and glycerine. It does not redden blue litmus paper. A slip of deal dipped into it, and afterwards into hydrochloric acid, and then allowed to dry in the air, acquii'es a greenish-blue colour. It coagu- lates albumen. It does not affect the plane of polarisation of a ray of polarised light. Dose.—1 to 3 grains. Preparation. Glycerinum Acidi Carbolici . 1 part in 6 by weight ACIDUM CITRICUM. CiTEic Acid. 3HO,Ci2H50„ + 2HO or H3CgH.O7.H2O. A crystalline acid prepared from lemon-juice, or from the juice of the fruit of Citrus Limetta, Risso, the Lime. It may be obtained by][the following process :— Take of Lemon-juice , . . . .4 pints Prepared Chalk . . . • 4i ounces Sulphuric Acid . . . -2^ fluid ounces Distilled Water . . . , a sufficiency Heat the lemon-juice to its boiling-point and add the chalk by degrees till there is no more effervescence. Collect the deposit on a calico filter, and wash it with hot water till the filtered liquor passes from it colourless. Mix the deposit with a pint of distilled water, and gradually add the sulphuric acid previously diluted with a pint and a half of distilled water. Boil gently for half an'hour, keeping the mixture constantly stirred. Separate the acid solution by filtration, wash the insoluble matter with a little distilled water, and add the washings to the solution. Concentrate this solution to the density of 1'21, then allow it to cool, and after twenty-four hours decant the liquor from the crystals of sulphate of lime