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..
Zincum. Zinc. Zn.=65.10.
Roast the native Zinc Sulphide or Carbonate, and reduce the resulting Oxide with Charcoal.
A bluish-white metal in the form of thin sheets, or irregular, granulated pieces, or moulded into thin pencils, or in a state of fine powder.
Zinci Chloridum. Zinc Chloride. ZnC12=135.84. Synonym. - Butter of Zinc.
Dissolve Zinc in Hydrochloric Acid by boiling. The solution contains Zinc Chloride, with Iron and Lead Chlorides as impurities. These are precipitated by adding first Nitric Acid, then Zinc Carbonate. Filter and finally evaporate. Zn2+4HCl=2ZnCl+2H2.
A white, granular powder, or porcelain-like masses irregular, or moulded into pencils; odorless, of such intensely caustic properties as to make tasting dangerous, unless the salt be dissolved in much water, when it has an astringent, metallic taste. Very deliquescent. Solubility. - In 0.3 part of water; very soluble in Alcohol.
Iron and lead chlorides, calcium and sulphates.
3. Liquor Zinci Chloridl - Solution of Zinc Chloride. Source. - Prepared as above, but with the addition of water. Characters. - A clear, colorless liquid of an astringent, sweetish taste.
Sp. gr. about 1.535. It contains about 50 per cent. by weight of the salt.
It is very caustic, penetrating deeply, and limited in its effect to the seat of application. It is strongly antiseptic, and a solution of it of sp. gr. 2.0, known as Burnett's fluid, is used as a domestic antiseptic.
Internal, see Toxicology.
It is used as a powerful caustic, and is often made into sticks with plaster of Paris to destroy warts, naevi, condylomata, lupoid patches, etc. For the same purpose it may be made into a paste with equal parts of starch or flour. Can-quoin's paste is a mixture of zinc chloride in varying strength with wheat flour and water. Either the liquor, or Burnett's fluid, may be employed to wash out bed-pans, closets, etc., but zinc chloride is not so commonly used as other antiseptics. Piatt's chlorides are said to consist of various salts of zinc, chiefly of the chloride, in saturated solution. Zinc chloride is not given internally.