Important: Safety Warning
This page describes trade processes that use dangerously toxic materials such as cyanide solutions, mercury amalgams, or strong acids. These processes require training, equipment, and precautions far beyond what the text describes.
In addition, this page presents medical treatment from an era before modern medicine. The remedies described are ineffective against the conditions named, and some of the ingredients or doses are harmful. Do not use them to treat any illness; consult a qualified medical professional.
This information has been left in for historical purposes but should not be acted upon.
Home › Acids › To Obtain Tannic Acid
To Obtain Tannic Acid
Expose nut-gall in fine powder to a damp atmosphere for 24 hours, then mix it with sufficient ether, previously washed with water, to form a soft paste. Set this aside, closely of rooms, &c. 3916. Carbolic Acid, also called Phenol, Phenic acid, and hydrate of Phenyle.
It consists of long, colorless prismatic crystals, which melt at about 90° Fahr. into an oily liquid resembling creosote. The crystals deliquesce in moist air, forming a sort of hydrate, which boils at 370° and has a specific gravity of 1.065. Heated with ammonia, it covered, for 6 hours; then envelope it quickly yields aniline and water; and nitric acid conin a close canvas cloth, and obtain the liquid verts it into picric acid. Commercial creosote portion by pressing powerfully between tinned consists principally of hydrated carbolic acid, plates. Reduce the resulting cake to powder, but is easily distinguishable from it, as carbolic mix it with sufficient cthe shaken with acid coagulates collodion, creosote does not. It has come into prominent notice as an effi- | a gargle, or in 25 parts of water for painting cient disinfectant. the throat, or in 50 parts for the carbolic