CrO3 — Properties & Data | MatWorld

CrO3

Name: CrO3
Brand: MatWorld

semiconductor

· CrO3

Chromium trioxide (CrO3) is an inorganic oxide semiconductor compound used primarily in electrochemical and catalytic applications. In industry, it serves as an oxidizing agent in chrome electroplating and anodizing processes, where it deposits protective chromium coatings on metal substrates, and as a catalyst or catalyst precursor in organic synthesis and air purification systems. Engineers select CrO3 for applications requiring strong oxidizing capability and selective reactivity, though its use requires careful handling due to toxicity and environmental considerations; it is increasingly being studied as an alternative semiconductor material for niche photocatalytic and sensing applications.

electroplating and metal finishingchromium coating depositioncatalytic oxidation processesenvironmental remediationsemiconductor researchcorrosion protection coatings

Compliance & Regulations

?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	22.91	GPa	DFT · OptB88vdW
Poisson's Ratio(ν)	0.3000	-	DFT · OptB88vdW
Shear Modulus(G)	12.05	GPa	DFT · OptB88vdW

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions	Source
Density(ρ)	3.538	kg/m³	DFT · OptB88vdW

Verified Unverified Low confidence (<80%) Link to source

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)3 entries	1.400	eV	Measured
↳	1.893	eV	DFT · OptB88vdW
↳	2.391	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)	12.14	-	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	6.431	-	DFT · OptB88vdW
↳	5.413	-	DFT · TBmBJ
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)2 entries	0.6824	C/m²	DFT · OptB88vdW
↳	0.9449	C/m²	DFT · PBE
Piezoelectric Stress Tensor(eij)	Matrix (redacted)	C/m²	DFT · PBE
Thermoelectric Power Factor(PF)2 entries	0.000350	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00143	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-420.8	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	413.4	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	14.74	%	DFT · TBmBJ

N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form, heat treatment, basis, or test environment.

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Method

Property	Value	Unit	Conditions
Energy Above Hull(ΔEhull)	0.3039	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)2 entries	-1.402	eV/atom	DFT · OptB88vdW
↳	-1.521	eV/atom	Measured

N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form, heat treatment, basis, or test environment.

Verified Unverified Low confidence (<80%) Link to source

Reference data from cited sources. Not verified or certified by MatWorld Inc. Verify against the source before use in design. Terms: engineering data

Regulatory Screening

Environmental

Export Control

RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.

CrO3

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

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