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.