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Sigma-Aldrich

Boric anhydride

granulated, ≥98.0% (T)

Synonym(s):

Boron trioxide

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About This Item

Empirical Formula (Hill Notation):
B2O3
CAS Number:
1303-86-2
Molecular Weight:
69.62
EC Number:
215-125-8
MDL number:
MFCD00011315
UNSPSC Code:
12352306
eCl@ss:
38120103
PubChem Substance ID:
57646939
NACRES:
NA.21

vapor density

>1 (vs air)

Quality Level

100

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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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
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

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
BCCG4192
BCCF5338
BCCD2847
BCCD2094
BCCC2103

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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)
Effect of Bi4B2O9 addition on the sintering temperature and microwave dielectric properties of BaO-Nd2O3-4TiO2 ceramics.
Xingyu Chen
Journal of Materials Science: Materials in Electronics, 24, 224-229 (2013)
Influence of Ar Pressure on Product Characteristics of Self-Propagating High-Temperature Synthesis from WO3/B2O3/Al Reactant System.
Tawat Chanadee et al.
Advanced Materials Research, 748, 32-35 (2013)
G Krishna Kumari et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 101, 140-147 (2012-10-27)
Divalent Mn2+ ions containing 20ZnO+xLi2O+(30-x)K2O+50B2O3(5≤x≤25) mol% glasses are prepared by using melt quench technique and are characterized by several spectroscopic techniques. Various physical parameters are evaluated from the measured values of density and refractive index for the observation of mixed
Ozcan Yalçinkaya et al.
Journal of hazardous materials, 195, 332-339 (2011-09-06)
New nano hybrid material (ZrO(2)/B(2)O(3)) was synthesized and applied as a sorbent for the separation and/or preconcentration of Co(II), Cu(II) and Cd(II) in water and tea leaves prior to their determination by flame atomic absorption spectrometry. Synthesized nano material was
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