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B0394

Sigma-Aldrich

Boric acid

ACS reagent, ≥99.5%

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About This Item

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

grade

ACS reagent

Quality Level

200

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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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
GHS08

Signal Word

Danger

Hazard Statements

H360FD

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

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Sigma-Aldrich

S9640

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Boric acid United States Pharmacopeia (USP) Reference Standard

USP

1076341

Boric acid

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