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Merck
CN

200107

Selenium dioxide

≥99.9% trace metals basis

Synonym(s):

NSC 56753, Selenium oxide

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About This Item

Linear Formula:
SeO2
CAS Number:
7446-08-4
Molecular Weight:
110.96
NACRES:
NA.22
PubChem Substance ID:
24851959
UNSPSC Code:
12352303
EC Number:
231-194-7
MDL number:
MFCD00003562

Key Documents

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Product Name

Selenium dioxide, ≥99.9% trace metals basis

InChI key

JPJALAQPGMAKDF-UHFFFAOYSA-N

InChI

1S/O2Se/c1-3-2

SMILES string

O=[Se]=O

vapor pressure

1 mmHg ( 157 °C)

assay

≥99.9% trace metals basis

form

solid

reaction suitability

reagent type: oxidant

mp

315 °C (subl.) (lit.)

Quality Level

200

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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.

signalword

Danger

Hazard Classifications

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

Storage Class

6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

wgk

WGK 2

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges

Regulatory Information

危险化学品
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Certificates of Analysis (COA)

Lot/Batch Number
MKCX6605
MKCT7321
MKCP1113
0000094212
MKCM1782

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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)
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
SeO2-Mediated Oxidative Transposition of Pauson-Khand Products
Dibrell SE, et al.
Journal of the American Chemical Society, 142(14), 6483-6487 (2020)
Selenium (IV) oxide
Hoekstra WJ, et al.
Encyclopedia of Reagents for Organic Synthesis, Second Edition, 1-12 (2001)
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