Ammonium-amalgam sulphide

Reduction of the corresponding nitroarylarsinic acid by the aid of ferrous salts and alkali, sodium, amalgam and methyl alcohol, or ammonium sulphide. 

It reacts with hydrochloric or hydriodic acids, giving acetic acid, naphthalene, and a mercuric halide four atoms of iodine react giving acetic acid, mercuric iodide, and iodonaphthalene sodium amalgam on the alcoholic solution yields mercury, acetic acid, and naphthalene alcoholic hydrogen sulphide or ammonium sulphide at 100° C. break the compound down into acetic acid, mercuric sulphide, and naphthalene. 

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