The British pharmaceutical codex : an imperial dispensatory for the use of medical practitioners and pharmacists / by authority of the Council of the Pharmaceutical Society of Great Britain.

Date:
1907
Catalogue details

Licence: In copyright

Credit: The British pharmaceutical codex : an imperial dispensatory for the use of medical practitioners and pharmacists / by authority of the Council of the Pharmaceutical Society of Great Britain. Source: Wellcome Collection.

Provider: This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)

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    minims); for a single administration 25 to 40 decimils (40 to 60 minims). Note.—iEther, U.S.P., contains about 96 per cent, by weight of ethyl oxide, and its specific gravity is 0 716 to 0-717 at 25°. iETHER ACETICUS. Acetic Ether. C^HA = 88-064. Synonym.—Ethyl Acetate. Acetic ether is ethyl acetate, CH3COOC.2H5, mixed with sniall quantities of alcohol and other substances, obtained by distilling ethyl alcohol, sulphuric acid, and dry sodium acetate, and purifying the product. It occurs as a colourless liquid, with a characteristic fragrant odour. Soluble in water (i in 10); miscible with alcohol, ether, and chloroform. Specific gravity, 0-900 to 0-905. Boiling-point.yjg to 77-8°. It should be neutral to litmus and not colour sulphuric acid, or leave any odorous residue when allowed to evaporate on filter paper. Acetic ether resembles ether in its action; it is employed as a carminative or antispasmodic and diaphoretic, but is seldom given internally. For inhalation 2 mils (30 minims) are added to 600 mils (i pint) of water. It is a constituent of Tinctura Ferri Acetatis, and is used as a solvent for cantharidin. Dose.—For repeated administration 12 to 25 decimils (20 to 40 minims); for a single administration 4 to 6 mils (60 to 90 minims). Note.—..Ether Aceticus, U.S.P., contains about 90 per cent, by weight of ethyl acetate and its specific gravity is 0-883 to 0-885 at 25°. >ETHER METHYLATUS. Methylated Ether. Methylated ether is prepared by distilling a mixture of methylated spirit and sulphuric acid. It consists of ethyl oxide, methyl oxide, methyl-ethyl oxide, and varying amounts of water, alcohol, and other impurities. It occurs as a colourless, light, volatile liquid, with the odour and properties of ether. Various qualities come into commerce, and are distinguished by their specific gravities, 0-717, 0-719, 0-720, 0-725, and 0-730 being usual. Those samples with the lower specific gravity contain less water and alcohol, and, as a rule, less of other impurities. Methylated ether of specific gravity 0-717 is most suitable for local anaesthesia in the form of spray, owing to its low-boiling point and complete volatility. The less pure varieties of higher specific gravity which frequently leave an unpleasant smelling residue, not volatile on the water-bath, are only employed as solvents and for ice-making. Besides being well adapted for local anaesthesia, methylated ether of specific gravity 0-720 may be used for general anaesthesia, when purified so as to answer the tests for .^ther Purificatus. Ordinary 3