A manual of materia medica and therapeutics : including the preparations of the British pharmacopoeia, and many other approved medicines / by J. Forbes Royle and Frederick W. Headland.

  • Royle, J. Forbes (John Forbes), 1798-1858.
Date:
1865
Catalogue details

Licence: Public Domain Mark

Credit: A manual of materia medica and therapeutics : including the preparations of the British pharmacopoeia, and many other approved medicines / by J. Forbes Royle and Frederick W. Headland. Source: Wellcome Collection.

    157/792 (page 145)
    The solution, like that of nil the protosalts of Iron, is of a green colour. If this be quickly filtered and evaporated, and with as little access of air as possible, the salt may be obtained without much de- composition, but the Iron is apt to pass rapidly to the state of Sesqui- oxide. As the solid preparation is liable to change, the Messrs. Smith recommend to powder their anhydrous Iodide as soon as it is taken from the flask, and then instantly to incorpoiate it with twice its weight of pure refined sugar in powder, and to make it into a mass with honey. 4 grains will contain 1 grain of the Iodide. Keep in shallow, coi'ked bottles in a layer of some powder. (P. J. iii. 490.) Tests. Crystalline, inodorous, deliquescent, entirely soluble in water, or nearly so, forming a pale-green solution. It gives off violet vapours when heated, leaving Sesquioxide of Iioii. The solution in an ilbclosed vessel quickly deposits Sesquioxide of Iron, and can be kept clear only in a vessel well closed and containing a coil of Iron wire. It answers to the common tests for Iodine, and for the Protoxide of Iron, ^. e. gives blue precipitates with the Ferridcyanide of Potassium and with mucilage ot Starch and Chlorine water. Inc. Acids, Alkalis, and their Carbonates, Lime- water and all such substances as are incompatible with Sulphate of Iron, such as vegetable astringents. Action. Uses. Combines a Chalybeate action with the alterative properties of Iodine. Particularly useful in Ana3mia of Scrofulous children. D. gr. j.—gr. V. or gr. x. in solution in water fa solution of gr. iij. in f5j. is a convenient strength), in syrup, or in the saccharine pills. Or it may be conveniently dissolved in Cod-liver Oil (4-—8 grs. in the oz.), for scrofulous patients. Syrupqs Ferei Iodidi, B. Syrup of Iodide of Iron. Prep. B. Prepare a syrup by dissolving Refined Sugar ^xxviij. in ^x. of Dist. Water with the aid of heat. Digest Iodine ^ij., and Fine Iron Wire in a flask, at a gentle heat, with Dist. Water Jiij., till the froth becomes white; then filter the liquid while still hot into the syrup, and mix. The product should weigh 2lb. lloz., and should have the specific gravity 1-385, The combination of the Iodine with the Iron takes place as before. It is complete when the froth becomes white. The preparation of the L. P. contained 5 gr. of the Iodide in each fluid drachm. This syrup is intended to be of the same strength, but contains more sugar. Sugar prevents the Protoxide of Ii'on from passing to the state ot Peroxide, as in the Ferri Carbonas Saccharata, and thus has been found to preserve the Iodide of Iron. A syrup was first suggested in Buch- ner's Repertor. fiir die Pharmacie for 1839. The E. C. first introduced a formula of the Messrs. Smith modified from one proposed by Dr. A. T. Thomson, in the Trans, of the Pharm. Society, i. 47. This solution undergoes little change, even when preserved for some time. It ought to be nearly colourless, or pale yellowish green, and without sedi- ment. Dr. C. cautions against employing common British Iodine unless allowance is made for the moisture of the Iodine. The syrup