Manual of the medicinal preparations of iron : including their presentation, chemistry, physiological action, and therapeutic use / by Harry Napier Draper.

  • Draper, Harry Napier.
Date:
1864
Catalogue details

Licence: Public Domain Mark

Credit: Manual of the medicinal preparations of iron : including their presentation, chemistry, physiological action, and therapeutic use / by Harry Napier Draper. Source: Wellcome Collection.

Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.

    108/162 (page 90)
    FERRI-POTASSIO-SULPHAS—POTASSIO-SULPHATE OF lEON. Preparation Protosulphate of iron . . 8 ounces. Sulphuric acid . . . 1 fl. „ Nitric acid . . . . 1^ „ „ Sulphate of potash . . . 2^ „ „ Water .... Proceed as in the case of the ammonia compound. Physical Characters Octohedral crystals, either colourless or pale violet. Chemistry The composition of the crystals of potash- iron alum is shown by the following formula :— K0,S03 + Fe^Os, 3SO3 + 24HO When exposed to the air they slowly effloresce, becom- ing covered with a white powder. When this iron alum is heated it first fuses in its water of crystallization, and then, losing this water, is converted into a yellowish white spongy mass. More strongly ignited, it fuses and gives off 24-4 per cent, of sulphuric acid, leaving a mixture of sulphate of potash and sesquioxide of iron. The crystals dissolve in five parts of water at 34° F. Physiological Action and Therapeutical Use— The therapeutic action of both the potash and ammonia sulphates of iron is alike, and one may be substituted for the other at pleasure. They are said to equal, if not exceed, ordinary alum in astringency, and not to possess the stimulating action of some of the salts of iron. Dose Three to six grains.