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B0394

Sigma-Aldrich

Boric acid

ACS reagent, ≥99.5%

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Linear Formula:
H3BO3
CAS Number:
Molecular Weight:
61.83
EC Number:
MDL number:
eCl@ss:
38120104
PubChem Substance ID:
NACRES:
NA.21

grade

ACS reagent

Quality Level

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 (PO43-): ≤0.001%
sulfate (SO42-): ≤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

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This Item
B0252339067202878
Boric acid ACS reagent, ≥99.5%

B0394

Boric acid

Boric acid ReagentPlus®, ≥99.5%

B0252

Boric acid

Boric acid 99.97% trace metals basis

339067

Boric acid

Boric acid 99.999% trace metals basis

202878

Boric acid

assay

≥99.5%

assay

≥99.5%

assay

99.97% trace metals basis

assay

99.999% trace metals basis

agency

suitable for SM 4500 - NH3, suitable for SM 5210

agency

suitable for SM 4500 - NH3, suitable for SM 5210

agency

suitable for SM 5210

agency

-

form

powder

form

powder

form

crystalline powder

form

crystalline powder

solubility

water: soluble

solubility

water: 40 mg/mL, clear, colorless

solubility

water: soluble

solubility

water: 49.2 g/L at 20 °C

density

1.440 g/cm3

density

1.440 g/cm3

density

1.440 g/cm3

density

1.49 g/cm3 at 23 °C

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.

Pictograms

Health hazard

Signal Word

Danger

Hazard Statements

Hazard Classifications

Repr. 1B

Storage Class Code

6.1D - Non-combustible, acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


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Boric acid United States Pharmacopeia (USP) Reference Standard

USP

1076341

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