Chromium Trioxide

CrO₃

IUPAC: Chromium(VI) oxide

CAS: 1333-82-0

Overview

Chromium trioxide is a powerful oxidizer and the source of hexavalent chromium in chrome plating baths. It is the most important industrial chromium(VI) compound.

Composition

Element Symbol Atoms Atomic Mass
Oxygen O 3 15.9990
Chromium Cr 1 51.9960

Elemental Composition

O
Oxygen ×3
48.0%
Cr
Chromium ×1
52.0%

Uses

  • • Chrome plating
  • • Wood preservation (CCA)
  • • Metal finishing
  • • Chemical oxidation

Fun Facts

  • ✦ Hard chrome plating using CrO₃ gives automotive bumpers and hydraulic cylinders their mirror finish

Safety

  • ⚠ Carcinogen
  • ⚠ Powerful oxidizer
  • ⚠ Corrosive
  • ⚠ Environmental hazard

Structure

SMILES

O=[Cr](=O)=O

Properties

Type
oxide
State
solid
Molar Mass
99.99 g/mol
Density
2.7000 g/cm³
Melting Point
196.0 °C
Solubility
625 g/L at 25°C

Molecular Descriptors

Exact Mass
99.9252
TPSA
51.2 Ų
H-Bond Donors
0
H-Bond Acceptors
3
Rotatable Bonds
0
Heavy Atoms
4
Complexity
61.0

Related Compounds

Aluminum Oxide

Al₂O₃

Antimony Trioxide

Sb₂O₃

Barium Oxide

BaO

Beryllium Oxide

BeO

Bismuth(III) Oxide

Bi₂O₃

Boron Trioxide

B₂O₃

Cadmium Oxide

CdO

Calcium Oxide

CaO

Carbon Dioxide

CO₂

Carbon Monoxide

CO

Frequently Asked Questions

What is Chromium Trioxide?
Chromium Trioxide (CrO₃) is a oxide compound with the IUPAC name Chromium(VI) oxide.
What is the molecular weight of Chromium Trioxide?
Chromium Trioxide has a molar mass of 99.99 g/mol.
What state is Chromium Trioxide at room temperature?
Chromium Trioxide is a solid at room temperature.
Is Chromium Trioxide organic or inorganic?
Chromium Trioxide is classified as an inorganic compound.
What elements make up Chromium Trioxide?
Chromium Trioxide (CrO₃) is composed of Oxygen (O), Chromium (Cr).