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11615

Sigma-Aldrich

Boric anhydride

granulated, ≥98.0% (T)

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Synonym(s):
Boron trioxide
Empirical Formula (Hill Notation):
B2O3
CAS Number:
Molecular Weight:
69.62
EC Number:
MDL number:
eCl@ss:
38120103
PubChem Substance ID:
NACRES:
NA.21

vapor density

>1 (vs air)

Quality Level

Assay

≥98.0% (T)
98.0-102.0% (titration)

form

solid

quality

granulated

loss

≤3% loss on ignition, 800 °C

mp

450 °C (lit.)

density

2.46 g/mL at 25 °C (lit.)

cation traces

Fe: ≤300 mg/kg

SMILES string

O=BOB=O

InChI

1S/B2O3/c3-1-5-2-4

InChI key

JKWMSGQKBLHBQQ-UHFFFAOYSA-N

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1 of 4

This Item
339075156781.00163
Boric anhydride granulated, ≥98.0% (T)

Sigma-Aldrich

11615

Boric anhydride

Boric anhydride 99.98% trace metals basis

Supelco

339075

Boric anhydride

Boric anhydride puriss. p.a., ≥98% (T)

Sigma-Aldrich

15678

Boric anhydride

di-Boron trioxide for silicate analysis

Supelco

1.00163

di-Boron trioxide

form

solid

form

powder

form

solid

form

solid

mp

450 °C (lit.)

mp

450 °C (lit.)

mp

450 °C (lit.)

mp

450 °C

density

2.46 g/mL at 25 °C (lit.)

density

2.46 g/mL at 25 °C (lit.)

density

2.46 g/mL at 25 °C (lit.)

density

2.46 g/cm3 at 20 °C

cation traces

Fe: ≤300 mg/kg

cation traces

-

cation traces

Ag: ≤5 mg/kg, Al: ≤50 mg/kg, Ba: ≤5 mg/kg, Bi: ≤5 mg/kg, Ca: ≤10 mg/kg, Cd: ≤5 mg/kg, Co: ≤5 mg/kg, Cr: ≤5 mg/kg, Cu: ≤5 mg/kg, Fe: ≤5 mg/kg, K: ≤30 mg/kg, Mg: ≤20 mg/kg, Mn: ≤5 mg/kg, Mo: ≤5 mg/kg, Na: ≤200 mg/kg, Ni: ≤5 mg/kg, Pb: ≤30 mg/kg, Sr: ≤5 mg/kg, Tl: ≤10 mg/kg, Zn: ≤5 mg/kg

cation traces

Ca: ≤0.002%, Fe: ≤0.0005%, K: ≤0.003%, Mg: ≤0.0005%, Na: ≤0.003%, heavy metals (as Pb): ≤0.002%

Quality Level

100

Quality Level

100

Quality Level

100

Quality Level

100

Application

Boric anhydride also referred to as boron trioxide or boron oxide (B2O3) has been used for preparing specimens of Bi4B2O9 ceramics. It has also been used for WO3/B2O3/Al system for investigating the impact of Ar gas pressure on the SHS reaction products.

Biochem/physiol Actions

Boric anhydride is an oxide of boron that shows antimicrobial property along with lower aminoalcohols.

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

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Antimicrobial properties of the products from the reaction of various aminoalcohols and boric anhydride.
S Watanabe
Materials Chemistry and Physics, 19, 191-195 (1988)
Influence of Ar Pressure on Product Characteristics of Self-Propagating High-Temperature Synthesis from WO3/B2O3/Al Reactant System.
Tawat Chanadee et al.
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