211176

Selensäure

98%

• Synonym(e): Selenious acid
• Lineare Formel: H₂SeO₃
• CAS-Nummer: 7783-00-8
• Molekulargewicht: 128.97
• EG-Nummer: 231-974-7
• MDL-Nummer: MFCD00011331
• UNSPSC-Code: 12352301
• PubChem Substanz-ID: 24852658
• NACRES: NA.22

Eigenschaften

• Qualitätsniveau: 200
• Assay: 98%
• Form: solid
• mp (Schmelzpunkt): 70 °C ((lit.)); 70 °C (dec.) (lit.)
• Löslichkeit: water: 50 mg/mL
• Dichte: 3.004 g/mL at 25 °C ((lit.)); 3.004 g/mL at 25 °C (lit.)
• SMILES String: O[Se](O)=O; O[Se](O)=O
• InChI: 1S/H2O3Se/c1-4(2)3/h(H2,1,2,3); 1S/H2O3Se/c1-4(2)3/h(H2,1,2,3)
• InChIKey: MCAHWIHFGHIESP-UHFFFAOYSA-N; MCAHWIHFGHIESP-UHFFFAOYSA-N

Beschreibung

Anwendung

Selenous acid can be used as a reagent to synthesize:

• α-Ketoacectals by reacting with acetophenones and triethylorthoformate in the presence of boron trifluoride etherate as a catalyst.
• 4-Formyl-7-methylcoumarin using 4,7-dimethylcoumarin in the presence of xylene as a solvent.
• Selenium substituted quinoxaline derivatives from 2,3-dichloro quionoxaline.

Sicherheitshinweise

• Piktogramme: GHS06,GHS08,GHS09
• Signalwort: Danger
• H-Sätze: H301 + H331,H373,H410
• P-Sätze: P260 - P264 - P273 - P301 + P310 - P304 + P340 + P311 - P314
• Gefahreneinstufungen: Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - STOT RE 2
• Lagerklassenschlüssel: 6.1D - Non-combustible acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects
• WGK: WGK 3
• Flammpunkt (°F): Not applicable
• Flammpunkt (°C): Not applicable
• Persönliche Schutzausrüstung: Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges