Chromium dioxide

HCID 73415796CAS 12018-01-8

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Basic information

Standard SMILES: [Cr+4].[O-2].[O-2]
InChIKey: IAQWMWUKBQPOIY-UHFFFAOYSA-N
Molecular formula: CrO2
Average molar mass: 83.995 g/mol

Overview

See also: Chromium dioxide (annotation moved to).

Names & identifiers

Preferred name: Chromium dioxide
IUPAC: chromium(4+);bis(oxygen(2-))
English name: chromium dioxide
Molecular formula: CrO2
Molecular weight: 83.99

Names & synonyms

CHROMIUM DIOXIDEChromium(IV) oxideMagtrievechromium (IV) oxideChromium oxide (CrO2)CHROMIUM DIOXIDE [MI]SCHEMBL1196147BHJ7466GLAMDRY 6415CHROMIUM DIOXIDE [HSDB]IAQWMWUKBQPOIY-UHFFFAOYSA-NQ2366389

Show more names

CrO2accroxraccroxcMAGTRIEVE(TM)chromiumdioxidechromiumoxide(cro2)chromium(iv)dioxidechromiumdioxide(cro2)

Database identifiers

CAS: 12018-01-8
PubChem CID: 73415796
UNII: 7BHJ7466GL

Properties

Computed structural properties

Topological polar surface area: 2 Å²
Hydrogen bond donors: 0
Hydrogen bond acceptors: 2
Rotatable bonds: 0
Heavy atoms: 3
Formal charge: 0
Complexity: 0

Physicochemical properties

Melting point: 375 °C · >375 °C (dec.)(lit.)
Boiling point: 2 O3℃ · decomposes to Cr2O3℃ [KIR78]
Density: 4.85 g/mL · 4.85 g/mL at 25 °C(lit.)
solubility: 2 O; · insoluble in H2O; soluble in acid solutions
form: brown-black tetragonal powder
color: brown-black tetragonal powder
Water Solubility: 2 O, · insoluble H2O, soluble acids giving Cr+++and dichromate [KIR78]
Merck: 13 · 13,2254
Major Application: battery manufacturing
InChI: InChI=1S/Cr.2O
InChIKey: AYTAKQFHWFYBMA-UHFFFAOYSA-N
SMILES: [Cr](=O)=O
CAS DataBase Reference: 12018 · 12018-01-8
FDA UNII: 7 BHJ7466GL · 7BHJ7466GL
EPA Substance Registry System: Chromium oxide (CrO2) (12018-01-8)
UNSPSC Code: 12352300 · 12352300
NACRES: 23 · NA.23
Symbol(GHS): 7 · GHS07
Signal word: Warning
Hazard statements: 319 · H319
Precautionary statements: 305 · P305+P351+P338
PPE: 95 · dust mask type N95 (US), Eyeshields, Gloves
Hazard Codes: Xi
Risk Statements: 36 · 36
Safety Statements: 26 · 26-36
WGK Germany: 3 · 3
RTECS: 6400000 · GB6400000
TSCA: TSCA listed
Storage Class: 11 · 11 - Combustible Solids
Hazard Classifications: 2 · Eye Irrit. 2
Hazardous Substances Data: 12018 · 12018-01-8(Hazardous Substances Data)

Safety & regulation

Safety data

PPE: dust mask type N95 (US), Eyeshields, Gloves
wgk: 3
tsca: TSCA listed
rtecs: GB6400000
risk_code: 36
Signal word: Warning
Symbol(GHS): GHS07
hazard_code: Xi
safety_code: 26-36
Storage Class: 11 - Combustible Solids
Hazard statements: H319
Hazard Classifications: Eye Irrit. 2
Precautionary statements: P305+P351+P338
Hazardous Substances Data: 12018-01-8(Hazardous Substances Data)

Chemistry & industry

Applications · 3 items

UsesChromium dioxide is used exclusively for magnetic recording media. It may also be used in combination with cobalt-modified iron oxides in the production of magnetic recording media. The world consumption of CrO2 is decreasing continuously as compact disc and digital videodisc are taking over the audio and video market. The sole producer is DuPont. In the course of the development of pigments for magnetic information storage, CrO2 was the first widely used pigment material that gave a higher recording density than ã-Fe2O3. In the field of audio recording this led to the IEC II standard or “chrome position”.

UsesFacilitates high yield aromatization of Hantzsch 1,4-dihydropyridines to the corresponding pyridines.

UsesIn magnetic recording tapes; as catalyst.