Materia medica and therapeutics : an introduction to the rational treatment of disease / by J. Mitchell Bruce.

  • John Mitchell Bruce
Date:
1886
Catalogue details

Licence: Public Domain Mark

Credit: Materia medica and therapeutics : an introduction to the rational treatment of disease / by J. Mitchell Bruce. Source: Wellcome Collection.

    53/650
    From Potassii Ferrocyanidiim are made : a. Acidiim Hydrocyanicum Dilutum. )8. Potassii Cyanidum. — Cyanide of Potas- sium. KCN. Source. — Made by fusing Ferrocyanide of Potassium, and purifying the product. 2K4FeCg]Srg = 8KCN + 2FeC + C2 + 2N2. Characters.—White, opaque,deliquescent masses, with odour of prussic acid ; intensely poisonous. Fotassii Cyanidum is used to maJce : Bismuthum Purificatum. 2. Potassii Tartras Acida.—Acid Tartrate of I. Potassium. Cream of Tartar. KHC4H40g. Source.—Prepared from argol, deposited in wine-casks during the fermentation of grape juice, and from the lees of wine, by purification and evaporation. Characters.—A white gritty powder, or fragments of crys- talline cakes; of a pleasant acid taste; not deliquescent. Solubility, 1 in 180 of cold water. When heated, evolves in- flammable gas, and leaves a black residue of 0 and K2CO3. Impurity.—Tartrate of Lime. Lose.—20 to 60 gr. as a diuretic and refrigerant; 2 to 8 dr. as a purgative. Acid Tartrate of Potassium is an iny^^edient of: Confectio Sulphuris (1 in 9) ; and Pulvis Jala- pse Compositus (9 in 15). It is also used in pre- paring Acidum Tartaricum, Ferrum Tartaratum, Antimonium Tartaratum, and Soda Tartarata. From this salt is made : Potassii Tartras.—Tartrate of Potassium. Soluble Tartrate of Potassium. K,C4H406,H20. Source.—MoidiQ by boiling Acid Tartrate of Potas- sium in a solution of Carbonate of Potassium, and crys- tjillising. 2KHC4H40g -f K^COg = 2K2C4H4O6 + CO^ -f H2O. Characters.—Small, colourless, deliquescent prisms. Solubility, 10 in 8 of water; insoluble in alcohol. Lnptcrities.—Acid Tartrate, detected by comparative insolubility; Carbonate, quantitatively. Dose, 20 to 60 gr. as a diuretic and antacid ; 2 to 4 dr. as a purgative. 3. Potassii Nitras.—Nitrate of Potassium. Nitre. ^alti)etre. KNO3.