aluminium chloride

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• noun inorganic chemistry AlCl, only exists in the gas phase when AlCl3 is heated with aluminium.
• noun inorganic chemistry AlCl3, the aluminium salt of hydrochloric acid; forms the covalent dimer Al2Cl6 when melted; it has very many industrial applications, including that of a catalyst in Friedel-Crafts reactions.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a chloride used as a wood preservative or catalyst