B0394

Boric acid

ACS reagent, ≥99.5%

• Linear Formula: H₃BO₃
• CAS Number: 10043-35-3
• Molecular Weight: 61.83
• EC Number: 233-139-2
• MDL number: MFCD00011337
• UNSPSC Code: 12352106
• eCl@ss: 38120104
• PubChem Substance ID: 329773111
• NACRES: NA.21

Properties

• grade: ACS reagent
• agency: suitable for SM 4500 - NH3; suitable for SM 5210
• vapor pressure: 2.6 mmHg ( 20 °C)
• assay: ≥99.5%
• form: powder
• technique(s): PCR: suitable
• impurities: ≤0.005% Insoluble in methanol; ≤0.05% Nonvolatile with methanol
• mp: 160 °C (dec.) (lit.)
• solubility: water: soluble
• density: 1.440 g/cm³
• anion traces: chloride (Cl^-): ≤0.001%; phosphate (PO₄^3-): ≤0.001%; sulfate (SO₄^2-): ≤0.01%
• cation traces: Ca: ≤0.005%; Fe: ≤0.001%; heavy metals: ≤0.001% (by ICP)
• SMILES string: OB(O)O
• InChI: 1S/BH3O3/c2-1(3)4/h2-4H
• InChI key: KGBXLFKZBHKPEV-UHFFFAOYSA-N

Description

General description

Boric acid is a weak monobasic Lewis acid(electron pair acceptor), which finds application in the areas of glass making, fire retardant, lubrication agent, buffer, and neutron absorber.

Application

Boric acid can be used as a catalyst to synthesize:

• N-substituted cinnamamides via amidation reaction between cinnamic acid and benzylamines.
• β-Aminoalcohols through the regioselective epoxides ring opening with aromatic amines in the presence of glycerol as a co-catalyst.
• Organosulfur compounds via thia-Michael addition of thiols to α, β-unsaturated compounds.

It can also be used as an activator for the solvent-free reduction of aldehydes and ketones to alcohols in the presence of sodium borohydride.

Safety Information

• pictograms: GHS08
• signalword: Danger
• hcodes: H360FD
• pcodes: P201 - P202 - P280 - P308 + P313 - P405 - P501
• Hazard Classifications: 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