Medical Dictionary

Nessler's reagent

noun Ness·ler's reagent \ ˈnes-lərz- \

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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