71950

Natriumselenit

anhydrous, ≥90.0% (RT)

• Synonym(e): Selenious acid disodium salt
• Lineare Formel: Na₂SeO₃
• CAS-Nummer: 10102-18-8
• Molekulargewicht: 172.94
• EG-Nummer: 233-267-9
• MDL-Nummer: MFCD00003489
• UNSPSC-Code: 12352302
• PubChem Substanz-ID: 329763654
• NACRES: NA.22

Eigenschaften

• Qualitätsniveau: 200
• Assay: ≥90.0% (RT)
• Form: powder
• Verlust: ≤0.5% loss on drying, 200 °C
• mp (Schmelzpunkt): >350 °C (lit.)
• SMILES String: [Na+].[Na+].[O-][Se]([O-])=O
• InChI: 1S/2Na.H2O3Se/c;;1-4(2)3/h;;(H2,1,2,3)/q2*+1;/p-2
• InChIKey: BVTBRVFYZUCAKH-UHFFFAOYSA-L

Beschreibung

Anwendung

Sodium selenite can be used:

• In dehydrogenation of benzoins to benzils and, flavanones to flavones under thermal and microwave conditions.
• As a catalyst along with cysteine or glutathione in the reductive debromination of vic-dibromides to alkenes.
• To prepare bis(methylmercuric) selenide (BMS) by reacting with methylmercuric chloride and reduced glutathione or cysteine.

Sodium selenite is a common source of selenium in the synthesis of zinc selenide (ZnSe). It is used as a key precursor in the synthesis of bismuth selenide nanocomposites, nickel cobalt selenides, selenium nanobelts and t-selenium nanotubes.

Sicherheitshinweise

• Piktogramme: GHS06,GHS09
• Signalwort: Danger
• H-Sätze: H300 + H330,H315,H317,H319,H411
• P-Sätze: P260 - P273 - P280 - P302 + P352 - P304 + P340 + P310 - P305 + P351 + P338
• Gefahreneinstufungen: Acute Tox. 2 Inhalation - Acute Tox. 2 Oral - Aquatic Chronic 2 - Eye Irrit. 2 - Skin Irrit. 2 - Skin Sens. 1
• Zusätzliche Gefahrenhinweise: EUH031
• Lagerklassenschlüssel: 6.1B - Non-combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials
• WGK: WGK 2
• Flammpunkt (°F): Not applicable
• Flammpunkt (°C): Not applicable
• Persönliche Schutzausrüstung: Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges