Selenium Dioxide CAS#7446-08-4 Product Description
Selenium dioxide is widely employed as an oxidizing reagent in organic chemistry, serving as an important component in numerous oxidation reactions and synthetic transformations. While its application in certain areas has become more limited due to toxicity concerns and the availability of alternative oxidizing agents, it continues to hold an established position in modern organic synthesis.
It is particularly valuable for the selective oxidation of reactive methyl, methylene, and hydroxymethyl groups, enabling important functional group modifications and facilitating the synthesis of a diverse range of organic compounds.
Selenium Dioxide CAS#7446-08-4 Chemical Properties
| Melting point | 315 °C (subl.)(lit.) |
| Boiling point | 684.9 °C(lit.) |
| density | 4.81 g/mL at 25 °C(lit.) |
| vapor pressure | 1 mm Hg ( 157 °C) |
| refractive index | nD20 <1.76 |
| Fp | 315°C |
| storage temp. | Store below +30°C. |
| solubility | H2O: soluble |
| form | powder |
| color | white |
| Specific Gravity | 3.95 |
| PH | 2 (10g/l, H2O, 20℃) |
| Water Solubility | 38.4 g/100 mL (14 ºC) |
| Sublimation | 315 ºC |
| Merck | 148434 |
| Exposure limits | ACGIH: TWA 0.2 mg/m3 |
| NIOSH: IDLH 1 mg/m3; TWA 0.2 mg/m3 | |
| Stability: | Stable. Incompatible with organic materials, strong acids, ammonia, nitric acid, halogen acids. Protect from moisture. |
| CAS DataBase Reference | 7446-08-4(CAS DataBase Reference) |
| NIST Chemistry Reference | Selenium dioxide(7446-08-4) |
| EPA Substance Registry System | Selenium dioxide (7446-08-4) |
Selenium Dioxide CAS#7446-08-4 Safety Information
| Hazard Codes | T,N,Xn |
| Risk Statements | 36/38-50/53-33-23/25-51/53-20/22 |
| Safety Statements | 26-61-60-45-28A-20/21-28 |
| RIDADR | UN 3440 6.1/PG 3 |
| WGK Germany | 2 |
| RTECS | VS8575000 |
| F | 3 |
| TSCA | Yes |
| HS Code | 2811 29 90 |
| HazardClass | 6.1 |
| PackingGroup | II |
| Hazardous Substances Data | 7446-08-4(Hazardous Substances Data) |
| Toxicity | LD50 orally in Rabbit: 68.1 mg/kg |
Selenium Dioxide CAS#7446-08-4 Product Application
Selenium dioxide is a highly effective selective oxidizing agent and an important raw material for the production of various selenium-based compounds. It has a broad range of applications across organic synthesis, glass manufacturing, metallurgy, surface treatment, and analytical chemistry.
1.Organic Synthesis and Pharmaceutical Intermediates
Widely used in organic chemistry for Riley oxidation and the selective oxidation of allylic and benzylic positions. These reactions facilitate the preparation of aldehydes, ketones, and various pharmaceutical intermediates.
2.Glass Manufacturing and Ceramic Applications
Employed as a glass decolorizing agent to reduce the green coloration associated with iron impurities. It is also used in the production of red-colored glass and as a coloring component in ceramic materials.
3.Electrolytic Manganese Production
Used as an additive in electrolytic manganese manufacturing to help improve current efficiency during the electrolysis process.
4.Metal Surface Treatment
Incorporated into steel bluing and browning formulations for decorative surface finishing and corrosion protection of metal components.
6.Analytical Chemistry
Utilized as an analytical reagent in chemical testing, including the detection and identification of alkaloids.
5.Manufacturing of Selenium-Based Chemicals
Serves as an important starting material for the preparation of selenium-containing catalysts and a variety of other specialized selenium compounds.
