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.
This information has been left in for historical purposes but should not be acted upon.
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Solution of Chloride of Potash
This solution is also known as Javelle's Bleaching Liquid; Eau de Javelle, &c. This is best part sublimed carbonate of ammonia in 3 made by passing gaseous chlorine into a solu- parts water, and adding 1 part ammoniation of 1 part of carbonate of potash in 10 water. Used in chemical analyses, and as parts of water, until the gas ceases to be a very delicate test for the presence of lime, absorbed. It may also be made by adding from a solution of which it forms a white precipitate soluble in nitric or hydrochloric acid. 4793. Solution of Sulphuretted Hydrogen. Pass sulphuretted hydrogen gas through cold distilled water, recently boiled, a solution of carbonate of potash to a solution of chloride of lime, with agitation, as long as a precipitate forms; the liquid being afterwards decanted or filtered. These processes are precisely similar to that for the soda solu- until it will absorb no more. Keep in small tion, an equivalent portion of carbonate of bottles securely stoppered. potash being used. (See Nos. 4788, &c.)