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27081

Sigma-Aldrich

Chromium(VI) oxide

puriss. p.a., ACS reagent, ≥99.0% (RT)

Synonym(s):

Chromic anhydride

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About This Item

Empirical Formula (Hill Notation):
CrO3
CAS Number:
1333-82-0
Molecular Weight:
99.99
EC Number:
215-607-8
MDL number:
MFCD00010952
UNSPSC Code:
12352303
PubChem Substance ID:
329752970

grade

ACS reagent
puriss. p.a.

Assay

≥99.0% (RT)

form

powder, crystals or granules

impurities

≤0.005% total nitrogen (N)

pH

<1 (20 °C, 100 g/L)

mp

196 °C (dec.) (lit.)

anion traces

chloride (Cl-): ≤50 mg/kg
sulfate (SO42-): ≤50 mg/kg

cation traces

Al: ≤50 mg/kg
Ba: ≤50 mg/kg
Ca: ≤100 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cu: ≤10 mg/kg
Fe: ≤100 mg/kg
K: ≤50 mg/kg
Mg: ≤5 mg/kg
Mn: ≤10 mg/kg
Na: ≤2000 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Zn: ≤5 mg/kg

SMILES string

O=[Cr](=O)=O

InChI

1S/Cr.3O

InChI key

WGLPBDUCMAPZCE-UHFFFAOYSA-N

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Other Notes

Oxidant used in the decomposition by solubilization or fusion

Signal Word

Danger

Hazard Classifications

Acute Tox. 2 Inhalation - Acute Tox. 3 Dermal - Acute Tox. 3 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 1A - Eye Dam. 1 - Muta. 1B - Ox. Sol. 1 - Repr. 2 - Resp. Sens. 1 - Skin Corr. 1A - Skin Sens. 1 - STOT RE 1 Inhalation - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

5.1A - Strongly oxidizing hazardous materials

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

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Z. Sulcek et al.
Methods of Decomposition in Inorganic Analysis (1989)
Raman spectroscopy of chromium oxide supported on Al2O3, TiO2 and SiO2: A comparative study.
Hardcastle FD and Wachs IE.
J. Mol. Catal., 46(1), 173-186 (1988)
R. Bock
Aufschlussmethoden der anorg. & org. Chemie (1972)
Study of the chromium (VI) oxide-pyridine complex.
Holum JR.
The Journal of Organic Chemistry, 26(12), 4814-4816 (1961)
Chromium (VI) oxide-catalyzed oxidation of arenes with periodic acid.
Yamazaki S.
Tetrahedron Letters, 42(19), 3355-3357 (2001)
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