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Sigma-Aldrich

Chromium(VI) oxide

99.99% trace metals basis

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:
24885294
NACRES:
NA.23

Assay

99.99% trace metals basis

form

powder or flakes

reaction suitability

reagent type: oxidant

mp

196 °C (dec.) (lit.)

application(s)

battery manufacturing

SMILES string

O=[Cr](=O)=O

InChI

1S/Cr.3O

InChI key

WGLPBDUCMAPZCE-UHFFFAOYSA-N

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General description

Chromium(VI) oxide (CrO3) is a hexavalent chromium that is majorly used as an oxidizing agent. It oxidizes the C-H bonds in the aromatic rings to form benzoic acid from alkyl benzene. It can be prepared by adding concentrated sulphuric acid in potassium dichromate.

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

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Chromium(III) oxide powder, ≥98%

Sigma-Aldrich

393703

Chromium(III) oxide

Chromium powder, ≥99% trace metals basis, <45 μm

Sigma-Aldrich

266299

Chromium

Chromium Oxidations in Organic Chemistry (2011)
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
Sethsiri S Samaratunga et al.
Environmental science and pollution research international, 15(1), 27-30 (2008-03-01)
Chromium enters into the aquatic environment as a result of effluent discharge from steel works, electroplating, leather tanning industries and chemical industries. As the Cr(VI) is very harmful to living organisms, it should be quickly removed from the environment when
Kyung-Hwa Son et al.
Journal of toxicology and environmental health. Part A, 67(13), 1027-1049 (2004-06-19)
CrO3 is cytotoxic for human epithelial 293 kidney cells over a narrow concentration range of approximately 2-8 microM (D50 approximately 3.0 microM); significantly greater toxicity is observed in clonogenic assays (D50 approximately 0.1-1.0 microM). Survival of a small fraction of
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)
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