ferric chloride

noun

, Chemistry.

a compound that in its anhydrous form, FeCl 3 , occurs as a black-brown, water-soluble solid; in its hydrated form, FeCl 3 ⋅xH 2 O, 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.

First recorded in 1890–95

It gave a bluish-black color with impure ferrous sulphate and a dark color with ferric chloride.

An alcoholic solution of this substance gave a dark color with ferric chloride and a light colored precipitate with lead acetate.

A small portion of the tar residue in alcoholic solution gave a color reaction with ferric chloride.

The filtrate did not give any color with ferric chloride, but it reduced Fehling solution.

This solution was yellow and gave a reaction with ferric chloride similar to that of gallic acid.

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