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200107

Sigma-Aldrich

Selenium dioxide

≥99.9% trace metals basis

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Synonym(s):
NSC 56753, Selenium oxide
Linear Formula:
SeO2
CAS Number:
7446-08-4
Molecular Weight:
110.96
EC Number:
231-194-7
MDL number:
MFCD00003562
UNSPSC Code:
12352303
PubChem Substance ID:
24851959
NACRES:
NA.22

vapor pressure

1 mmHg ( 157 °C)

Quality Level

200

Assay

≥99.9% trace metals basis

form

solid

reaction suitability

reagent type: oxidant

mp

315 °C (subl.) (lit.)

SMILES string

O=[Se]=O

InChI

1S/O2Se/c1-3-2

InChI key

JPJALAQPGMAKDF-UHFFFAOYSA-N

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Application

Selenium dioxide (SeO2) can be used as:
  • An oxidizing agent to introduce carbonyl functional groups at activated carbon.
  • A catalyst in the allylic hydroxylation reactions.
  • An oxidant in the synthesis of amides by oxidative amidation of aldehydes with amines.
  • A catalyst to synthesize di and trioxidized bicyclic cyclopentenones by reacting with Pauson-Khand reaction (PKR) products.
  • A catalyst along with iodine (I2) to prepare mono and bis-sulfenylindoles by treating indoles with diaryl disulfides via C-H sulfenylation.
  • A catalyst to synthesize alkyl and aryl nitriles from the corresponding aldehydes via the formation of aldoxime.
  • A selenium precursor to synthesize FeSe nanostructures via electrochemical deposition method.

It can also be used as a versatile reagent for allylic oxidation and oxidative-elimination reactions.

Signal Word

Danger

Hazard Statements

H301 + H331,H373,H410

Hazard Classifications

Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - STOT RE 2

WGK

WGK 2

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Information

危险化学品

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Y. Zhang, et al.,
Heterocycles, 83, 2337-2342 (2011)
Yilin Wang et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 79(5), 1311-1315 (2011-06-15)
A novel method has been developed for the synthesis of thioglycolic acid (TGA)-capped CdSe quantum dots (QDs) in an aqueous medium when selenium dioxide worked as a selenium source and sodium borohydride acted as a reductant. The interaction between CdSe
Metal-free synthesis of amides by oxidative amidation of aldehydes with amines in PEG/oxidant system
Liang J, et al.
Tetrahedron, 67(44), 8532-8535 (2011)
Electrodeposition of nano-dimensioned FeSe
Chen PY, et al.
Thin Solid Films, 519(23), 8397-8400 (2011)
Yan Bai et al.
Journal of nanoscience and nanotechnology, 11(6), 5012-5017 (2011-07-21)
This paper reported the preparation and antioxidant capacities of element selenium nanoparticles (nanoSe(0))-ascorbic acid (Vc) sol and nanSe(0)/Vc/selenocystine (SeCys) sol-gel compounds. NanoSe(0)-Vc sol was prepared by reduction of selenious dioxide (SeO2) with Vc. In the nanoSe(0)-Vc sol, highly concentrated Vc
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