Calcium Dichromate(VI)
Title: Calcium Dichromate(VI)
CAS Registry Number: 14307-33-6
Additional Names: Calcium bichromate
Molecular Formula: CaCr2O7
Molecular Weight: 256.07
Percent Composition: Ca 15.65%, Cr 40.61%, O 43.74%
Literature References: Prepn: Hartford et al., J. Am. Chem. Soc. 72, 3353 (1950).
Derivative Type: Trihydrate
Properties: Bipyramidal orange-red crystals. Nonhygroscopic if pure. Dec on heating above 100° to CaCrO4 and CrO3. d430 2.370. Very sol in water; insol in ether, CCl4, hydrocarbons; dissolves in alc with immediate reduction of the dichromate and pptn of brown hydrous chromic chromate; dissolves in acetone with subsequent pptn of CaCrO4.
Density: d430 2.370
Use: As catalyst; in manuf of CrCl3 and CrO3; corrosion inhibitor.

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