Zinc. Continued
Description
This section is from the book "Materia Medica Pharmacy, Pharmacology And Therapeutics", by W. Hale White. Also available from Amazon: Materia Medica Pharmacy, Pharmacology And Therapeutics..
Zinc. Continued
4. Zinci Sulphas. Zinc Sulphate
Zinci Sulphas. Zinc Sulphate. ZnSo4+7H2O=286.64. Synonym. - White Vitriol.
Source
Made with Zinc and Sulphuric Acid as the chloride was made from Hydrochloric Acid, and with the same precautions for removing impurities.
Characters
Colorless, transparent rhombic crystals, without odor, very like Magnesium Sulphate (see p. 162), but having an astringent, metallic taste. Solubility. - In 0.6 part of water; insoluble in Alcohol.
Impurities
Lead, iron, copper and arsenic.
Incompatibles
Alkalies and other carbonates, lime water, lead acetate, silver nitrate, astringent vegetable infusions or decoctions, and milk.
Dose, 1/2 to 2 gx.; .03 to .12 gm. (tonic): 10 to 30 gr.; .60 to 2.00 gm. (emetic).
5. Zinci Carbonas Praecipitatus. Precipitated Zinc Carbonate
Zinci Carbonas Praecipitatus. Precipitated Zinc Carbonate. 2(ZnCo3)3Zn(OH)2?=546.94?.
Source
Boil together solutions of Zinc Sulphate and Sodium Carbonate. 3ZnSo4+3Na2Co3+2H2O=2(ZnCo3)3Zn(OH)2+2Co2+3Na2So4. Dry the precipitated Zinc Salt.
Characters
An impalpable, white powder, of somewhat variable chemical composition, without odor or taste. Similar in constitution to Magnesium Carbonate. Solubility. - Insoluble in water and Alcohol.
Impurities
Sulphates, chlorides and copper.
Zinc Carbonate is rarely used except to make the Oxide and Acetate.
6. Zinci Oxidum. Zinc Oxide
Zinci Oxidum. Zinc Oxide. ZnO=81.06.
Source
Heat the precipitated Carbonate to redness in a crucible. 2(ZnCo3)3Zn(OH)2,=3ZnO+3H2O+Co2.
Characters
An amorphous, white, tasteless, and odorless powder. Solubility. - Insoluble in water and Alcohol.
Impurities
The carbonate and its impurities. Dose, 1 to 5 gr.; .06 to .30 gm.
Preparations
1. Unguentum Zinci Oxidi. Ointment Of Zinc Oxide
Unguentum Zinci Oxidi. Ointment Of Zinc Oxide. Zinc Oxide, 200; Benzoinated Lard, 800; melted together.
2. Oleatum Zinci. Oleate Of Zinc
Oleatum Zinci. Oleate Of Zinc. Zinc Oxide, 50; Oleic Acid, 950.
7. Zinci Acetas. Zinc Acetate
Zinci Acetas. Zinc Acetate. Zn(C2H3O2)2,+2H2O=218.74.
Source
Dissolve Zinc Oxide in Acetic Acid and water, and boil. ZnO+2Hc2h3o2=Zn(C2H3O2)2+H2O. Zinc Acetate crystallizes out.
Characters
Soft, white, six-sided monoclinic plates, of a pearly lustre, having a faintly acetous odor, and an astringent, metallic taste. Solubility.- In 2.7 parts of water; and in 36 parts of Alcohol.
Impurities
Those of the precipitated carbonate.
Incompatibles
The same as of the sulphate.
Dose, 1/2 to 2 gr.; .03 to .12 gm. (tonic).
8. Zinci Bromidum. See Bromine.
9. Zinci Iodidum. See Iodine.
10. Zinci Valerianas. See Valeriana.
11. Zinci Phosphidum. See Phosphorus.
12. Zinci Sulphocarbolas. See Acidum Carbolicum.
Continue to:
My Books
