Nessler's reagent

noun
Ness·​ler's reagent | \ ˈnes-lərz- How to pronounce Nessler's reagent (audio) \

Medical Definition of Nessler's reagent

: an alkaline solution of potassium mercuric iodide used in chemical analysis especially in a test for ammonia in aqueous solution (as when obtained from water, blood, or urine) with which it forms a yellowish brown color or precipitate

called also Nessler's solution

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