325473

Selenium dioxide

reagent grade, powder, 98%

• Sinonimo/i: NSC 56753, Selenium oxide
• Formula condensata: SeO₂
• Numero CAS: 7446-08-4
• Peso molecolare: 110.96
• Numero CE: 231-194-7
• Numero MDL: MFCD00003562
• Codice UNSPSC: 12352303
• ID PubChem: 24859512
• NACRES: NA.22

Proprietà

• Grado: reagent grade
• Livello qualitativo: 200
• Tensione di vapore: 1 mmHg ( 157 °C)
• Saggio: 98%
• Forma fisica: powder
• Impiego in reazioni chimiche: reagent type: oxidant
• Colore: off-white to pink
• Punto di fusione: 315 °C (subl.) (lit.)
• Stringa SMILE: O=[Se]=O
• InChI: 1S/O2Se/c1-3-2; JPJALAQPGMAKDF-UHFFFAOYSA-N

Descrizione

Applicazioni

Selenium dioxide (SeO₂) is mainly used to oxidize the α-methylene carbon atoms adjacent to a double bond to form allylic hydroxy derivatives.
Other applications:

• SeO₂ reacts with olefins in the presence of tert-butyl hydrogen peroxide to form allylic alcohols without the formation of rearrangement or dehydration by-products. This reagent system is also useful for the oxidation reactions of acetylenic fatty esters.
• SeO₂ can be used for the oxidation of 1,3,5-cycloheptatriene to form tropone.
• Piperidoindole systems on oxidation with SeO₂ forms either 2-acyl- or 3-acyl-indoles or fully aromatic β-carbolines, depending on the starting material.
• SeO₂ reacts with chlorotrimethylsilane to form selenium oxychloride in situ, which is an effective chlorinating reagent for alcohols. This reagent is a better alternative to thionyl chloride and other chlorinating agents.

Informazioni sulla sicurezza

• Pittogrammi: GHS06,GHS08,GHS09
• Avvertenze: Danger
• Indicazioni di pericolo: H301 + H331,H373,H410
• Consigli di prudenza: P260 - P264 - P273 - P301 + P310 - P304 + P340 + P311 - P314
• Classi di pericolo: Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - STOT RE 2
• Codice della classe di stoccaggio: 6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects
• Classe di pericolosità dell'acqua (WGK): WGK 2
• Punto d’infiammabilità (°F): Not applicable
• Punto d’infiammabilità (°C): Not applicable
• Dispositivi di protezione individuale: Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges