What is the reaction of Nessler's reagent on ammonia?

Nessler's reagent is slightly alkaline (made by adding KOH or NaOH)Potassium tetraiodomercurate (K2HgI4), prepared by combining potassium iodide and mercuric chloride. read more

Test of ammonia or NH4+ group is done with the help of Nessler's reagent,which changes the colour of Nessler's reagent to brown in basic medium. The reaction involved is— 2k2[hgi4]+3koh+nh3 =[ohg2. read more

* There is a small brown precipitate. It looks like deep yellow ochre with more of yellow in it. Nestles Reagent is used to detect ammonia, usually in water quality tests. read more

Nessler’s reagent for qualitative det. of ammonia and ammonium compounds; CAS Number: 7783-33-7; Synonym: Potassium tetraiodomercurate – Potassium hydroxide solution; find Sigma-Aldrich-72190 MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldrich. read more