Molekula
Oxoselane oxide
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Oxoselane oxide, also known as selenium dioxide, is a chemical compound used in organic synthesis, catalysis, and as an oxidizing agent. It also serves as a starting material for other selenium compounds, a glass colorant, a photographic toner, and an additive in metal etching and finishing baths. It appears as a white to pale yellow crystalline solid. CAS: 7446-08-4, Molecular Formula: SeO2, Molecular Weight: 110.96 g/mol, Storage: Ambient, Signal Word: Danger. Molekula supplies Oxoselane oxide from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
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Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White to off-white solid |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 6.1 |
| Packing Group | II |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Lustrous tetragonal needles; yellowish green vapor |
| Odour | Vapor has a pungent sour smell |
| Melting Point | 340 °C under pressure |
| Boiling Point | 315 °C at 760 mmHg (sublimes) |
| Water Solubility | 400 g/L at 20 °C |
| Solubility (other solvents) | Soluble in concentrated sulfuric acid |
| Vapour Pressure | 1.65 kPa at 70 °C |
Source: PubChem CID 24007 (HSDB, CAMEO Chemicals, ICSC)
Identification
| Property | Value |
|---|---|
| SKU | 89998915 |
| CAS Number | 7446-08-4 |
| IUPAC Name | selenium dioxide |
| EC Number | 231-194-7 |
| Molecular Formula | SeO2 |
| Molecular Weight | 110.96 |
| Exact Mass | 111.9064 |
| SMILES | O=[Se]=O |
| InChIKey | JPJALAQPGMAKDF-UHFFFAOYSA-N |
| InChI | InChI=1S/O2Se/c1-3-2 |
| PubChem CID | 24007 |
| UN Number | UN3283 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2811.29.2000 |
| Tariff Code | 2811299090 |
Safety & GHS
-
Corrosive
GHS05
-
Toxic
GHS06
-
Serious Health Hazard
GHS08
-
Hazardous to the Environment
GHS09
Hazard statements
- H300 Fatal if swallowed
- H314 (sub cat. 1B) Causes severe skin burns and eye damage
- H331 Toxic if inhaled
- H372 Causes damage to organs through prolonged or repeated exposure
- H410 Very toxic to aquatic life with long lasting effects
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
- P302+352 IF ON SKIN: Wash with soap and water
- P304+312 IF INHALED: Call a POISON CENTER or doctor/physician if you feel unwell
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- (oxo-lambda4-selanylidene)oxidane
- Oxide, Selenium
- Selenious anhydride
- SELENIUM DIOXIDE
- Selenium dioxide dimer
- Selenium oxide (1:2)
- Selenium oxide (Se2O4)
- Selenium oxide (SeO2)
- Selenium(IV) dioxide (1:2)
- Selenous acid anhydride
Frequently asked questions
What is Oxoselane oxide used for?
Oxoselane oxide (SeO2) is primarily used as a reagent in organic synthesis, particularly in oxidation reactions such as the oxidation of alkenes and alcohols.
What is the chemical formula and molecular weight of Oxoselane oxide?
The chemical formula is SeO2 and the molecular weight is 110.96 g/mol.
How should Oxoselane oxide be stored?
It should be stored at ambient temperature, away from moisture and incompatible materials.
What grade of Oxoselane oxide does Molekula supply?
Molekula supplies Oxoselane oxide in reagent grade.
Can Molekula supply Oxoselane oxide in bulk?
Yes, Molekula can supply Oxoselane oxide in bulk quantities—please contact our sales team for details.
What documentation comes with an order of Oxoselane oxide?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS) with the shipment.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.