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ferric chloride

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noun Chemistry.
a compound that in its anhydrous form, FeCl3, occurs as a black-brown, water-soluble solid; in its hydrated form, FeCl3⋅xH2O, it occurs in orange-yellow, deliquescent crystals: used chiefly in engraving, for deodorizing sewage, as a mordant, and in medicine as an astringent and styptic.
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Also called iron trichloride, iron perchloride.

Origin of ferric chloride

First recorded in 1890–95
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

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