Physical Properties:
Chemical Names Chromic Acid, Chromic Anhydride, Chromium
Trioxide, Chromium VI Oxide
Formula CrO3
Color Dark Red
Molecular Weight 99.99
Melting Point 197¡ÆC (386.5¡ÆF)
Density 2.70 @ 25¡ÆC
Bulk Density (Flake)
Loose 67 lb./cu. ft. (average)
Tapped 86 lb./cu. ft. (average)
Solubility Highly soluble in water (63% @ 25¡ÆC)
Heat of Solution Exothermic (24.7 cal./g.; 44.5 BTU/lb.)
Stability in Air Deliquesces at humidity above 30%
Behavior on Heating Decomposes above melting point
pH 0.20-2.0 depending on concentration