12018-01-8

Basic information

• Product Name: Chromium(IV) oxide
• Synonyms: accroxc;accroxr;Chromium oxide (CrO2);chromium(iv)dioxide;chromiumdioxide;chromiumdioxide(cro2);chromiumoxide(cro2);CrO2
• CAS NO: 12018-01-8
• Molecular Formula: CrO₂
• Molecular Weight: 83.9949
• EINECS: 234-630-4
• Mol File: 12018-01-8.mol

Chemical Properties

• Melting Point: 375℃
• Appearance: black tetrahedral ferromagnetic crystals
• Density: 4.89 g/cm³
• CAS DataBase Reference: Chromium(IV) oxide(CAS DataBase Reference)
• NIST Chemistry Reference: Chromium(IV) oxide(12018-01-8)
• EPA Substance Registry System: Chromium(IV) oxide(12018-01-8)

Safety Data

• Hazardous Substances Data: 12018-01-8(Hazardous Substances Data)

Usage

Uses

Used in Magnetic Storage Media Industry:
Chromium(IV) oxide is used as a magnetic material for creating magnetic storage media, such as audio and video tapes, due to its high stability and corrosion resistance. Its magnetic properties make it an ideal choice for long-term data storage and playback.
Used in Industrial Applications:
Chromium(IV) oxide is used as a highly stable and corrosion-resistant material in various industrial applications, including the manufacturing of high-performance coatings, cutting tools, and wear-resistant components.
Used in Catalyst Research:
Chromium(IV) oxide is studied as a potential catalyst in various chemical reactions due to its unique properties. Its catalytic activity can enhance the efficiency and selectivity of chemical processes, leading to improved product yields and reduced environmental impact.

InChI:InChI=1/Cr.2O/rCrO2/c2-1-3

Synthetic route

chromium(0) hexacarbonyl (199620-14-9, 13007-92-6) → chromium dioxide (12018-01-8)

Conditions	Yield
With oxygen In gaseous matrix Irradiation (UV/VIS); irradiation in O2-doped argon matrices at ca. 12K for 275 min;; determined by IR-spectroscopy;

barium hydroxide monohydrate + chromium dioxide (12018-01-8) + N-carbobenzyloxy-4-cis-thiophenoxy-L-proline methyl ester → 1-(Phenylmethyl)-3-pyrrolidinemethanol (5731-17-9)

Conditions	Yield
With carbon dioxide In sulfuric acid; water

Upstream product

• 199620-14-9 chromium⁽⁰⁾ hexacarbonyl 

Downstream Products

• 5731-17-9 1-(Phenylmethyl)-3-pyrrolidinemethanol 

Relevant articles and documents

Formation of Molecular Chromium(IV) Oxide (CrO2) by Photolysis of Cr(CO)6 in O2-doped Argon Matrices

The binary chromium oxide, CrO2, is produced upon prolonged broad-band u.v. -visible irradiation of Cr(CO)6 isolated in O2-doped argon matrices at ca. 12 K.Infrared spectroscopic studies involving isotopic substitution with 18O show that CrO2 is a non-linear dioxo molecule with an upper limit for the O-Cr-O bond angle of 117+/-3 degree.Measurements of the intensities of the infrared absorptions arising from the symmetric and antisymmetric CrO2 stretches of this molecule give a value for O-Cr-O of 112+/-2 degree, confirming the non-linear structure.