229946

Natriumtetraborat

99.998% trace metals basis

• Synonym(e): Borax, geschmolzen
• Lineare Formel: Na₂B₄O₇
• CAS-Nummer: 1330-43-4
• Molekulargewicht: 201.22
• EG-Nummer: 215-540-4
• MDL-Nummer: MFCD00081185
• UNSPSC-Code: 12352302
• PubChem Substanz-ID: 24853761
• NACRES: NA.22

Eigenschaften

• Qualitätsniveau: 100
• Assay: 99.998% trace metals basis
• Form: powder
• mp (Schmelzpunkt): 741 °C (lit.)
• Dichte: 2.367 g/mL at 25 °C (lit.)
• SMILES String: [Na+].[Na+].[O-]B1Ob2ob([O-])ob(O1)o2
• InChI: 1S/B4O7.2Na/c5-1-7-3-9-2(6)10-4(8-1)11-3;;/q-2;2*+1
• InChIKey: UQGFMSUEHSUPRD-UHFFFAOYSA-N

Beschreibung

Anwendung

Sodium tetraborate, also known as borax(Na₂B₄O₇), can be employed as a catalyst:

• In the chemoselective oxidation of alkyl and aryl sulfides to sulfoxides and sulfones using H₂O₂ as the oxidant.
• In the synthesis of pyridines, dienes, anilines, and dihydropyrano[3,2-c]chromenes via Knoevenagel condensation and Michael addition pathway.
• In thiolysis of 1,2-epoxides to β-hydroxy sulfides.

Rechtliche Hinweise

Sicherheitshinweise

• Piktogramme: GHS08,GHS07
• Signalwort: Danger
• H-Sätze: H319,H360FD
• P-Sätze: P202 - P264 - P280 - P305 + P351 + P338 - P308 + P313 - P337 + P313
• Gefahreneinstufungen: Eye Irrit. 2 - Repr. 1B
• Lagerklassenschlüssel: 6.1D - Non-combustible acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects
• WGK: WGK 1
• Flammpunkt (°F): Not applicable
• Flammpunkt (°C): Not applicable
• Persönliche Schutzausrüstung: Eyeshields, Gloves, type P3 (EN 143) respirator cartridges