Chromium Trioxide
An inorganic compound, CrO3, 99.993 g/mol. Boiling point Approximately 250 °C decomposes, melting point 197 °C, as published.
Identifiers
- Molecular formula
- CrO₃
- Molecular weight
- 99.993 g/mol
- Exact mass
- 99.925251 g/mol
- IUPAC name
- trioxochromium
- O=[Cr](=O)=O
- InChI=1S/Cr.3O
- WGLPBDUCMAPZCE-UHFFFAOYSA-N
Measured properties
- Boiling Point
- 482 °F at 760 mmHg (decomposes) (NTP, 1992)
- Approximately 250 °C decomposes
- Melting Point
- 385 °F (NTP, 1992)
- 197 °C
- Density
- 2.7 (NTP, 1992) - Denser than water; will sink
- 2.70
- Solubility
- Very soluble (NTP, 1992)
- Solubility in water, 61.7 g/100 cc solution at 0 °C; 67.45 g/100 cc solution at 100 °C
- Vapor Pressure
- Very low (NIOSH, 2024)
- Very low
Calculated properties
- Molecular weight
- 99.994 g/mol
- Exact mass
- 99.925249 Da
- Polar surface area
- 51.2 Ų
- Complexity
- 61
- H-bond donors
- 0
- H-bond acceptors
- 3
- logP
- -0.3589
- Topological polar surface area
- 51.21 Ų
- H-bond donors
- 0
- H-bond acceptors
- 3
- Rotatable bonds
- 0
- Molar refractivity
- 2.0595 cm³/mol
- Fraction sp³ carbons
- 0
- QED drug-likeness
- 0.4173
What it is made of
Elements
Structure
- Heavy atoms, hydrogen excluded
- 4
- Total atoms, hydrogen included
- 4
- Rings
- 0
- Aromatic rings
- 0
- Stereocentres
- 0
- Formal charge
- 0
The molecule in three dimensions
The drawing above is a diagram of what is bonded to what. A molecule is not flat, and the model here is one low-energy shape generated from the connectivity — useful for seeing which groups can reach each other, and not a measured structure. A real sample is a population of conformations, interconverting.
Reactions it appears in
Other names for it
The systematic name on this record is trioxochromium.
The sources also call it Chromium(VI) oxide, trioxochromium, CrO3, Chromtrioxid, Monochromium trioxide, CHROMIC TRIOXIDE, Chromsaeureanhydrid, Anhydride chromique, Chromium(6+) oxide, Chromia (CrO3), Chroomtrioxyde.
Structurally related
Seen alongside it in reaction records
Molecules that appear in the same recorded reactions as Chromium Trioxide. This says nothing about structure: most of them are the bases, solvents, ligands and catalysts the chemistry needed, and they are here because somebody put them in the same flask.
(4-Prop-2-ynylcyclohexyl)methanol
used as a reactant
C₁₀H₁₆O, 152.237 g/mol.
1-((Tert-butoxy)carbonyl)-4-hydroxypyrrolidine-2-carboxylic acid
used as a reactant
C₁₀H₁₇NO₅, 231.248 g/mol.
1,1-Dimethylethyl N-(4-formylphenyl)carbamate
formed as a product
C₁₂H₁₅NO₃, 221.256 g/mol.
(+/-)-3-[2,4-Bis(methoxymethoxy)phenyl]cyclohexanecarboxylic Acid
formed as a product
C₁₇H₂₄O₆, 324.373 g/mol.
1-((Tert-butoxy)carbonyl)-4-oxopyrrolidine-2-carboxylic acid
formed as a product
C₁₀H₁₅NO₅, 229.232 g/mol.
(+/-)-{3-[2,4-Bis(methoxymethoxy)phenyl]cyclohexyl}methanol
used as a reactant
C₁₇H₂₆O₅, 310.39 g/mol.
Where these values came from
chemistry engine
What this page does not claim
Identifiers are copied from the source record, measured values are reported as published, and calculated values are marked as calculated. Nothing here is a hazard, purity or handling assessment — how the library is checked.
Where to next
More molecules under C
The rest of this shelf, a hundred names at a time.
Molar mass calculator
Work with CrO3 in a calculation, with every element's contribution shown.
Molarity calculator
Grams of Chromium Trioxide for a volume and a concentration, or the concentration a mass gives.
Open in ReactionLens
The full record in the workstation: every atom, every bond, and the reactions it appears in.