antimony chloride

noun

: either of two chlorides of antimony:

a

: the trichloride SbCl₃ obtained as a colorless hygroscopic caustic crystalline solid from antimony and chlorine and used chiefly in coloring metals (such as iron, zinc), as a catalyst, and as a mordant

called also butter of antimony

b

: the pentachloride SbCl₅ obtained as a colorless to reddish yellow caustic oily liquid with an offensive odor and used chiefly as a chlorine carrier in organic synthesis and as a catalyst

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