Merck
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31146

Sigma-Aldrich

Boric acid

puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., buffer substance, ≥99.8%

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
puriss. p.a.

Agency

USP/NF
reag. ISO
reag. Ph. Eur.

vapor pressure

2.6 mmHg ( 20 °C)

Assay

≥99.8%

form

powder or crystals

impurities

≤0.005% insoluble in methanol
≤0.05% with methanol-HCl non-volat. matter

pH

3.6-4.0 (20 °C, 4%)

mp

160 °C (dec.) (lit.)

solubility

water: soluble

density

1.440 g/cm3

anion traces

chloride (Cl-): ≤3 mg/kg
phosphate (PO43-): ≤5 mg/kg
sulfate (SO42-): ≤5 mg/kg

cation traces

As: ≤5 mg/kg
Ca: ≤10 mg/kg
Cd: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤1 mg/kg
Mg: ≤5 mg/kg
Pb: ≤5 mg/kg
Zn: ≤5 mg/kg

SMILES string

OB(O)O

InChI

1S/BH3O3/c2-1(3)4/h2-4H

InChI key

KGBXLFKZBHKPEV-UHFFFAOYSA-N

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Boric acid puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., buffer substance, ≥99.8%

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Boric acid ReagentPlus®, ≥99.5%

Sigma-Aldrich

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Boric acid

grade

ACS reagent, puriss. p.a.

grade

for molecular biology

grade

-

grade

-

agency

USP/NF, reag. ISO, reag. Ph. Eur.

agency

-

agency

-

agency

-

vapor pressure

2.6 mmHg ( 20 °C)

vapor pressure

2.6 mmHg ( 20 °C)

vapor pressure

2.6 mmHg ( 20 °C)

vapor pressure

2.6 mmHg ( 20 °C)

assay

≥99.8%

assay

≥99.5%

assay

≥99.5%

assay

≥99.5%

form

powder or crystals

form

powder

form

powder

form

powder

impurities

≤0.005% insoluble in methanol, ≤0.05% with methanol-HCl non-volat. matter

impurities

-

impurities

≤0.005% Insoluble in methanol

impurities

-

General description

Boric acid can be used as a Lewis acid catalyst in organic synthesis to facilitate various organic reactions, including dehydration, hydrolysis, decarboxylation, and condensation reactions. It produces different borate anions and salts and can react with alcohols to produce borate esters. It is also used as a buffering agent and pH adjuster.
Boric acid is a very weak acid, having pH in the range of 3.6-4.0. Coulometric method for the determination of boric acid has been reported.

Application

Boric acid can be used as a precursor to synthesize boron carbon oxynitride thin films by the atmospheric pressure chemical vapor deposition (APCVD) method using carbon-rich methane and nitrogen-rich ammonia.

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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