Dr. Pereira's Elements of materia medica and therapeutics : abridged and adapted for the use of medical and pharmaceutical practitioners and students and comprising all the medicines of the British Pharmacopœia, with such others as are frequently ordered in prescriptions or required by the physician / edited by Robert Bentley and Theophilus Redwood ; with an appendix.

  • Jonathan Pereira
Date:
1874
Catalogue details

Licence: Public Domain Mark

Credit: Dr. Pereira's Elements of materia medica and therapeutics : abridged and adapted for the use of medical and pharmaceutical practitioners and students and comprising all the medicines of the British Pharmacopœia, with such others as are frequently ordered in prescriptions or required by the physician / edited by Robert Bentley and Theophilus Redwood ; with an appendix. Source: Wellcome Collection.

    70/1180 (page 38)
    [§ Liquor Ammonise Acetatis. Solution of Acetate of Ammonia .* Acetate of Ammonia, NH^O^HgOs or NH4C2H302, dissolved in water. Take of Acetic Acid . . . .10 fluid ounces. Carbonate of Ammonia > , ounces, or a sufficiency. Distilled Water . . . pints. Reduce tlie carbonate of ammonia to powder, and add it gradually to the acetic acid, until a neutral solution is formed, then add the water. Dose, 2 to 6 fluid drachms.] Synonyms.—Spiritus Mindereri, Mindererus's Spirit. Liquor Ammoniae Acetatis Concentrate. Concentrated Solution of Acetate of Ammonia. Take of Strong solution of Ammonia . 3J fluid ounces, or a sufficiency. Acetic Acid . . . » 10 fluid ounces, or a sufficiency. Mix gradually, and if the product is not neutral to test papers, make it so by the addition of the proper quantity of either liquid. Dose, a fluid drachm or more. This concentrated solution was the Liquor Ammonia Acetatis of the British Pharmacopoeia of 1864. It is sometimes supplied by wholesale houses, for convenience in carriage, with instructions to dilute it with five times its volume of water, to bring it to the strength of the preparation now ordered in the Pharmacopoeia ; but from this it differs in its being entirely free from carbonic acid, some of which gas is retained in the solution when made with car- bonate of ammonia. The concentrated solution may be used with advantage in lotions containing acetate or subacetate of lead, as the presence of carbonic acid in such cases is undesirable. The neutral condition of the acetate of ammonia can also be more easily ascer- tained in the concentrated solution than in the other, and this is sometimes considered an advantage; but, on the other hand, the presence of carbonic acid in the weaker solution made with carbonate of ammonia renders this solution more agreeable to the palate. Characters and Tests.—A transparent colourless liquid, with a saline taste. Treated with caustic potash, it gives off an ammoniacal, and with sulphuric acid an acetous, odour. The concentrated solution, diluted with four or five volumes of distilled water, and the * This nearly corresponds with Liquor Ammonise Acetatis, London and Edin- burgh ; it is about | stronger than the Dublin, and only £ the strength of L?ouor Ammonise Acetatis, 1864.