A solution of potassium hydroxide, mercuric iodide, and potassium iodide; it yields a yellow colour with ammonia (a brown precipitate with larger amounts) that can be used for quantitative assay. ... (05 Mar 2000) ... 
an aqueous solution of potassium iodide, mercuric chloride, and potassium hydroxide, used as a test for the presence of ammonia. Also called