Nessler's reagent
noun
Ness·ler's reagent
ˈnes-lərz- 
: 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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“Nessler's reagent.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/Nessler%27s%20reagent. Accessed 23 Nov. 2024.
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