200107

Selenium dioxide

≥99.9% trace metals basis

• 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

Properties

• 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

Description

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.

Safety Information

• pictograms: GHS06,GHS08,GHS09
• signalword: Danger
• hcodes: H301 + H331,H373,H410
• pcodes: P260 - P264 - P273 - P301 + P310 - P304 + P340 + P311 - P314
• Hazard Classifications: Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - STOT RE 2
• wgk_germany: WGK 2
• flash_point_f: Not applicable
• flash_point_c: Not applicable
• ppe: Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges