Mercuric amidochloride is an inorganic compound with the formula HgNH2Cl. It consists of a zig-zag 1-dimensional polymer (HgNH2)n with chloride
counterions. It arises from the reaction of ammonia and mercuric chloride. Addition of base converts it into "Millon's base," which has the formula
[Hg2N]OH(H2O)x. A variety of related amido and nitrido materials with chloride, bromide, and hydroxide are known.
At one time, before the toxicity of mercury was appreciated, this material was considered as antiseptic and disinfectant.
http://en.wikipedia.org/wiki/Mercuric_amidochloride
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