S9640

Sodium tetraborate decahydrate

ACS reagent, ≥99.5%

• Synonym(s): Borax decahydrate, Sodium borate decahydrate
• Linear Formula: Na₂B₄O₇ · 10H₂O
• CAS Number: 1303-96-4
• Molecular Weight: 381.37
• EC Number: 215-540-4
• MDL number: MFCD00149193
• UNSPSC Code: 12352302
• PubChem Substance ID: 329824630
• NACRES: NA.21

Properties

• grade: ACS reagent
• Quality Level: 200
• agency: suitable for SM 4500 - NH3
• vapor pressure: 0.213 hPa ( 20 °C)
• assay: ≥99.5%
• form: powder or crystals
• impurities: ≤0.005% Insoluble matter
• pH: 9.15-9.20 (25 °C, 0.01 M in solution)
• density: 1.73 g/mL at 25 °C (lit.)
• anion traces: chloride (Cl^-): ≤0.001%; phosphate (PO₄^3-): ≤0.001%; sulfate (SO₄^2-): ≤0.005%
• cation traces: Ca: ≤0.005%; Fe: ≤5 ppm; heavy metals (as Pb): ≤0.001%
• SMILES string: O.O.O.O.O.O.O.O.O.O.[Na+].[Na+].[O-]B1Ob2ob([O-])ob(O1)o2
• InChI: 1S/B4O7.2Na.10H2O/c5-1-7-3-9-2(6)10-4(8-1)11-3;;;;;;;;;;;;/h;;;10*1H2/q-2;2*+1;;;;;;;;;;
• InChI key: CDMADVZSLOHIFP-UHFFFAOYSA-N

Description

General description

Sodium tetraborate decahydrate is a naturally occurring material used as a catalyst or additive for many organic transformations such as Nef reaction, Knoevenagel condensation, substitution, addition, selective methylation of vicinal diols, and desilylation of trimethylsilyl alkynones.

Application

Sodium tetraborate decahydrate can be used as a catalyst in the:

• Regioselective thiolysis of 1,2-epoxides by using thiols to synthesize β-hydroxy sulfides.
• Hetero-Michael addition of thiols with electron-deficient olefins to synthesize corresponding β-adducts.
• Solvent-free Biginelli reaction to synthesize 3,4-dihydropyrimidin-2(1H)-ones.

It can also be used as an additive to prepare polypyrrole-borax composites with high dielectric properties.

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