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Chromium chloride describes inorganic compounds with the formula CrCl2n. The anhydrous solid is white when pure, however commercial samples are often grey or green; it is hygroscopic and readily dissolves in water to give bright blue air-sensitive solutions of the tetrahydrate Cr4Cl2. Chromium chloride has no commercial uses but is used on a laboratory-scale for the synthesis of other chromium complexes.
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