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236470

Sigma-Aldrich

Chromium(VI) oxide

ACS reagent, ≥98.0%

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Synonym(s):
Chromic anhydride
Empirical Formula (Hill Notation):
CrO3
CAS Number:
Molecular Weight:
99.99
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NB.24

grade

ACS reagent

assay

≥98.0%

form

powder or crystals

reaction suitability

reagent type: oxidant

impurities

≤0.01% insolubles

pH

<1 (20 °C, 100 g/L)

mp

196 °C (dec.) (lit.)

anion traces

chloride (Cl-): ≤0.005%
nitrate (NO3-): ≤0.05%
sulfate (SO42-): ≤0.005%

cation traces

Fe, Al, Ba: ≤0.03%
Na: ≤0.2%

SMILES string

O=[Cr](=O)=O

InChI

1S/Cr.3O

InChI key

WGLPBDUCMAPZCE-UHFFFAOYSA-N

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1 of 4

This Item
6756442326531.00229
vibrant-m

236470

Chromium(VI) oxide

Essential Grade
vibrant-m

675644

Chromium(VI) oxide

-
vibrant-m

232653

Chromium(VI) oxide

-
vibrant-m

1.00229

Chromium(VI) oxide

-
Quality Level

200

Quality Level

200

Quality Level

100

Quality Level

300

assay

≥98.0%

assay

99.99% trace metals basis

assay

99.9% trace metals basis

assay

≥99.0% (iodometric)

impurities

≤0.01% insolubles

impurities

-

impurities

-

impurities

≤0.02% Substances precipitated by ammonia

pH

<1 (20 °C, 100 g/L)

pH

-

pH

<1 (20 °C, 100 g/L)

pH

<1 (20 °C, 100 g/L in H2O)

cation traces

Fe, Al, Ba: ≤0.03%, Na: ≤0.2%

cation traces

-

cation traces

-

cation traces

Fe: ≤0.01%, K: ≤0.005%, N: ≤0.005%, Na: ≤0.2%

General description

Chromium(VI) oxide is an oxidizing reagent for the oxidation of carbon-hydrogen bonds to alcohols, alkylaromatics to ketones and carboxylic acids, alkenes to α, β-unsaturated ketones, arenes to quinones, and alcohols to aldehydes, ketones, acids, and keto acids.

signalword

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

5.1A - Strongly oxidizing hazardous materials

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable


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Chromium (VI) Oxide
Freeman F, et al.
e-EROS Encyclopedia of Reagents for Organic Synthesis (2001)
Chromium (VI) Oxide.
Freeman F, et al.
e-EROS Encyclopedia of Reagents for Organic Synthesis. (2008)
Chromium (VI) oxide-catalyzed oxidation of arenes with periodic acid.
Yamazaki S.
Tetrahedron Letters, 42(19), 3355-3357 (2001)
Evidence for the protective effect of ascorbic acid (vitamin C) in treatment with gamma-rays and chromium (VI) oxide (CrO3) in somatic cells of Drosophila.
O Olvera et al.
Mutation research, 346(1), 19-21 (1995-01-01)
Sara L Holland et al.
Toxicology in vitro : an international journal published in association with BIBRA, 24(6), 1764-1767 (2010-07-20)
Toxicity of the environmental carcinogen chromate is known to involve sulfur starvation and also error-prone mRNA translation. Here we reconcile those facts using the yeast model. We demonstrate that: (i) cysteine and methionine starvation mimic Cr-induced translation errors, (ii) genetic

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