F6rrum Reductum - Ferri Reducti - Reduced Iron (U. S. P.). (Iron by Hydrogen; Quevenne's Iron.) - Origin. - Obtained by passing hydrogen through a hot, closed tube containing freshly prepared and thoroughly washed ferric oxide. It should contain not less than 90 per cent. of pure metallic iron.

Description and Properties. - A very fine, grayish-black, lustreless powder, odorless and tasteless; permanent in dry air; insoluble in water or alcohol.

Dose. - 1-5 grains (0.065-0.3 Gm.) [1 grain (0.065 Gm.), U. S. P.].

Ferri Carbonas Saccharatus - Ferri Carbonatis Saccharati - Saccharated Ferrous Carbonate (U. S. P.). - Origin. - Prepared from ferrous sulphate, sodium bicarbonate, sugar, and distilled water, by solution and filtration. It should contain not less than 15 per cent. of ferrous carbonate.

Description and Properties. - A greenish-brown powder gradually becoming oxidized by contact with air; without odor, and having at first a sweetish, afterward a slightly ferruginous, taste. Only partly soluble in water, but completely soluble in hydrochloric acid, with copious evolution of carbonic acid gas, forming a clear, greenish-yellow liquid. The product should be kept in small, well-stoppered bottles.

Dose. - 2-10 grains (0.12-0.6 Gm.) [4 grains (0.25 Gm.), U. S. P.].

Massa Ferri Carbonatis - Massae Ferri Carbonatis - Mass of Ferrous Carbonate (U. S. P.). (Vallet's Mass.) - Origin. - Prepared by solution, filtration, and evaporation from ferrous sulphate, sodium carbonate, clarified honey, sugar, syrup, and distilled water.

Description and Properties. - When recently prepared, the mass is of a greenish-gray color, but on exposure it becomes greenish-black.

Dose. - 3-5 grains (0.15-0.3 Gm.) [4 grains (0.25 Gm.), U. S. P.].

Mistura Ferri Composita - Misturae Ferri Compositae - Compound Iron Mixture (U. S. P.). (Griffith's Mixture.) - Origin. - Prepared by mixing ferrous sulphate, myrrh, sugar, potassium carbonate, spirit of lavender, and rose water.

Description and Properties. - When newly prepared it is of a dirty-greenish color, but slowly oxidizes on exposure to the air, and should therefore be freshly prepared when needed.

Dose. - 1/2-1 1/2 ounces (15.0-45.0 Cc.) [4 drams (16 Cc), U. S. P.].

Pilulae Ferri Iodidi - Pilulas (acc.) Ferri Iodidi - Pills of Ferrous Iodide (U. S. P.). - Origin. - Pills made of reduced iron, iodine, glycyrrhiza, sugar, extract of glycyrrhiza, acacia, balsam of tolu, water, and ether, evaporated to pilular consistence.

Description and Properties. - These preparations are very unstable, and should be kept from the light as much as possible.

Dose. - One or two pills, each pill containing nearly 1 grain (0.065 Gm.) of ferrous iodide.

Syrupus Ferri Iodidi - Syrupi Ferri Iodidi - Syrup of Ferrous Iodide (U. S. P.). - Origin. - A syrupy liquid containing 5 per cent. by weight of ferrous iodide.

Description and Properties. - A transparent, pale-green liquid, having a sweet, strongly ferruginous taste and a neutral reaction.

Dose. - 5-30 minims (0.3-2.0 Cc.) [15 minims (1 Cc), U. S. P.].

Ferri Chloridum - Ferri Chloridi - Ferric Chloride. - Origin. - Prepared by the action of hydrochloric acid and distilled water upon iron wire, subsequent filtration, addition of nitric acid, and crystallization. It should contain not less than 22 per cent. of metallic iron in the form of chloride.

Description and Properties. - Orange-yellow, crystalline pieces, odorless, or having a faint odor of hydrochloric acid and a strongly styptic taste; very deliquescent in moist air; freely and completely soluble in water or alcohol, also in a mixture of I part of ether and 3 parts of alcohol. Ferric chloride should be kept in glass-stoppered bottles, protected from light.

Dose. - It is chiefly used topically, as an astringent and hemostatic [1 grain (0.065 Gm.), U. S. P.].

Liquor Ferri Chloridi - Liquoris Ferri Chloridi - Solution of Ferric Chloride (U. S. P.). - Origin. - An aqueous solution of ferric chloride, FeCl3, containing not less than 29 per cent. of the anhydrous salt, corresponding to 10 per cent. of metallic iron.

Description and Properties. - A reddish-brown liquid, having a faint odor of hydrochloric acid, an acid, strongly styptic taste, and an acid reaction.

Dose. - 2-10 minims (0.12-0.6 Cc), largely diluted [1 1/2 minims (0.1 Cc), U. S. P.].

Tinctura Ferri Chloridi - Tincturae Ferri Chloridi - Tincture of Ferric Chloride (U. S. P.). - Origin. - A hydro-alcoholic solution of ferric chloride, containing about 13.28 per cent. of the anhydrous salt, corresponding to about 4.6 per cent. of metallic iron.

Description and Properties. -A bright, brownish liquid, having a slightly ethereal odor, a very astringent, styptic taste, and an acid reaction.

Dose. - 5-30 minims (0.3-2.0 Cc.) [8 minims (0.5 Cc), U. S. P.].

Liquor Ferri et Ammonii Acetatis - Liquoris Ferri et Ammonii Acetatis -Solution of Iron and Ammonium Acetate (U. S. P.) (Basham's Mixture.) -Formula. - Prepared with tincture of ferric chloride, 40 parts; diluted acetic acid, 60; solution of ammonium acetate, 500; aromatic elixir, 120; glycerin, 120; water, to 1000.

Dose. - 1-4 fluidrams (4.0-15.0 Cc.) [4 fluidrams (16 Cc), U. S. P.].

Ferri Citras - Ferri Citratis - Ferric Citrate (U. S. P.). - Origin. - Prepared by evaporating solution of ferric citrate on a water-bath at a temperature not exceeding 6o C. (140o F.). It should contain ferric citrate corresponding in amount to not less than 16 per cent. of metallic iron.

Description and Properties. - Thin, transparent, garnet-red scales, without odor, and having a slightly ferruginous taste. Slowly but completely soluble in cold water, and readily soluble in hot water, but diminishing in solubility with age. Insoluble in alcohol. Ferric citrate should be kept in well-stoppered bottles, protected from light.