noun, Chemistry, Pharmacology.
a white, crystalline, water-soluble powder, KI, having a bitter saline taste: used chiefly in the manufacture of photographic emulsions, as a laboratory reagent, in the preparation of Gram’s solution for biological staining, and in medicine as an expectorant and to treat thyroid conditions.

potassium iodide n.
A white crystalline compound used as an analytical reagent.
potassium iodide
A white crystalline compound used in photography and medicine and as a reagent in chemical analysis. It is also added to table salt to prevent goiter and other iodide-deficiency disorders. Chemical formula: KI.


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