Selenium Dioxide
Selenium(IV) Oxide
- CAS
- 7446-08-4
- EC
- 231-194-7
- Sectors
- Mining & Metals, Printing & Packaging, Pharma & Healthcare
Selenium Dioxide (CAS 7446-08-4) is an inorganic selenium(IV) oxide that occurs as a white crystalline powder, is water-soluble and forms selenious acid, and is used as an oxidizer in manganese electrolytic refining, photocopier toners, pharmaceutical selenium supplements and organic selenations for API intermediates.
Typical Properties
| Molecular formula | O2Se |
|---|---|
| Molecular weight | 110.96 g/mol |
| Form | powder |
| Color | white |
| Melting point | 340 °C |
| Boiling point | 684.9 °C |
| Density | 3.954 g/cm³ @ Temp: 15 °C |
| Water solubility | 38.4 g/100 mL (14 °C) |
| Flash point | 315°C |
| pH | 2 (10g/l, H2O, 20°C) |
| GHS signal word | Danger · Corrosive, Acute toxicity, Irritant / harmful, Health hazard, Environmental hazard |
| HS code | 28112900 |
| Grades available | Technical Grade |
Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.
Selenium Dioxide
Applications
In manganese electrolytic refining; in glass color neutralization; in photocopier toners; in pharma selenium supplements; and in organic selenations for API intermediates.
Safety & Risks
Acute toxicity with garlic breath symptom; chronic selenosis. Fume cabinets are obligatory; monitor air levels and provide selenium antidotes in kits.
Packaging
Sealed in 10 kg glass-lined steel cans. Lock in selenium hazard vaults.