Selenium dioxide
Selenium dioxide (CAS: 7446-08-4, Formula: SeO2) is an off-white to pink powder with a molecular weight of 110.96 g/mol. It is a strong oxidizing agent and a key reagent in organic synthesis. Its primary applications include the oxidation of allylic and benzylic methyl groups to aldehydes and ketones, and in the synthesis of various organoselenium compounds.
- IUPAC
- NSC 56753,Selenium oxide
Selective Oxidation
Selenium dioxide is extensively used for the selective oxidation of activated methylene groups and methyl groups adjacent to carbonyls, alkenes, or aromatic rings, typically forming carbonyl compounds.
Organic Synthesis Reagent
It serves as a versatile reagent in organic chemistry for functionalising carbon skeletons, particularly in the formation of carbon-heteroatom bonds and in various cyclization reactions.
Synthesis of Organoselenium Compounds
Selenium dioxide is a precursor for the preparation of a wide range of organoselenium compounds, which find applications in catalysis and medicinal chemistry.
| Molecular weight | 110.96 |
|---|---|
| Linear formula | SeO2 |
| Assay | 98% |
| Grade | reagent grade |
| Form | powder |
| Colour | off-white to pink |
| Vapour pressure | 1 mmHg (157 °C) |
| Melting point | 315 °C (subl.)(lit.) |
Hazard statements
- H301Toxic if swallowed
- H331Toxic if inhaled
- H373May cause damage to organs through prolonged exposure
- H410Very toxic to aquatic life with long-lasting effects
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P273Avoid release to the environment
- P301IF SWALLOWED
- P311Call a POISON CENTER or doctor
- P501Dispose of contents and container per local regulations
| Protective equipment | Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges |
|---|---|
| Transport (UN / ADR) | UN 3283 6.1 / PGIII |
| Water hazard class (WGK, DE) | 2 |
| Hazard codes (EU) | T,N |
| Risk statements (R) | 23/25-33-50/53 |
| Safety statements (S) | 20/21-28-45-60-61 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Selenium dioxide used for?
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Selenium dioxide is primarily used as a reagent in organic synthesis for selective oxidations, such as converting activated methyl or methylene groups to carbonyls, and for synthesizing organoselenium compounds.
What is the CAS number and formula for Selenium dioxide?
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The CAS number for Selenium dioxide is 7446-08-4, and its chemical formula is SeO2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Selenium dioxide in reagent grade with an assay of 98%. We do not represent this product as USP, BP, or EP grade.
How should Selenium dioxide be handled safely?
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Selenium dioxide is toxic and an oxidizer. Handle with extreme care in a well-ventilated area, using appropriate personal protective equipment including eyeshields, gloves, and a P2 respirator. Avoid ingestion and inhalation (H301, H331). It is also hazardous to the aquatic environment (H410).
Is Selenium dioxide a controlled substance?
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The provided data does not indicate that Selenium dioxide is a controlled substance.
How is Selenium dioxide packaged and exported?
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Selenium dioxide is shipped according to UN 3283, Class 6.1, Packing Group III regulations. Specific packaging details for export can be provided upon request.
How can I request a sample or quote for Selenium dioxide?
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To request a sample or quote for Selenium dioxide, please contact our sales team through the website or by calling our customer service line.
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