Some observations on the preparation and medicinal employment of the ioduret and hydriodate of iron / by Anthony Todd Thomson.

  • Thomson, Anthony Todd, 1778-1849.
Date:
1834
Catalogue details

Licence: Public Domain Mark

Credit: Some observations on the preparation and medicinal employment of the ioduret and hydriodate of iron / by Anthony Todd Thomson. Source: Wellcome Collection.

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

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    both preparations. The loduret requires to be well secured from the influence of the atmo- sphere ; both on account of its deliquescent property, the rapid oxidizement which the iron undergoes when dehquescence occurs, and the consequent decomposition which takes place. It is important to prevent this state of things, as the Peroxide of Iron is inert as a medicinal agent; M^hilst the free Iodine, extricated during its formation, alters, altogether, the virtues of the medicine. This partial decomposition of the loduret is rendered immediately apparent, on dissolving it in twenty times its weight of dis- tilled water and filtering: instead of a perma- nent, cZear, very pale greenish yellow, we obtain an ochre-coloured, or brown solution, which soon becomes turbid, and gradually de- posites an ochre-coloured, completely insolu- ble precipitate. Much' of the loduret usu- ally prepared both by many Chemists and Druggists, and also General Practitioners, is of this description; and to this we may refer some of the disappointment and discrepancy of opinion of different Practitioners respecting the operation of the medicine in similar cases. Even when the loduret has been carefully prepared, and is gopdiof its kindv it often, contains.a little free Iodine ? but it is chiefly owing to the care- lessness of assistants and apprentices, in com- pounding prescriptions, by frequently expos-