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sodium arsenite

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noun Chemistry.

a white or grayish-white, water-soluble, poisonous powder, NaAsO2, used chiefly in arsenical soaps for hides, as an insecticide, and as a weed-killer.

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On the farm, the feed for chicks is significantly different from the roosters’; ______ not even comparable.
Also called sodium meta-arsenite.
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