229946

Sodium tetraborate

99.998% trace metals basis

• Synonym(s): Borax, fused
• Linear Formula: Na₂B₄O₇
• CAS Number: 1330-43-4
• Molecular Weight: 201.22
• EC Number: 215-540-4
• MDL number: MFCD00081185
• UNSPSC Code: 12352302
• PubChem Substance ID: 24853761
• NACRES: NA.22

Properties

• assay: 99.998% trace metals basis
• form: powder
• mp: 741 °C (lit.)
• density: 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
• InChI key: UQGFMSUEHSUPRD-UHFFFAOYSA-N

Description

Application

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.

Legal Information

Safety Information

• pictograms: GHS08,GHS07
• signalword: Danger
• hcodes: H319,H360FD
• pcodes: P202 - P264 - P280 - P305 + P351 + P338 - P308 + P313 - P337 + P313
• Hazard Classifications: Eye Irrit. 2 - Repr. 1B
• Storage Class: 6.1D - Non-combustible acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects
• wgk_germany: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable
• ppe: Eyeshields, Gloves, type P3 (EN 143) respirator cartridges