202851

Sigma-Aldrich

Boric anhydride

99.999% trace metals basis

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:
Pricing and availability is not currently available.

Quality Level

vapor density

>1 (vs air)

assay

99.999% trace metals basis

form

crystals or chunks

reaction suitability

reagent type: catalyst
core: boron

mp

450 °C (lit.)

solubility

ethanol: soluble at 20 °C

density

2.46 g/mL at 25 °C (lit.)

SMILES string

O=BOB=O

InChI

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

InChI key

JKWMSGQKBLHBQQ-UHFFFAOYSA-N

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General description

Anhydride can be obtained by heating boric acid at temperatures higher than 160oC.1

Application

Reducing boron anhydride in the presence of sodium yields amorphous boron. Whereas reducing in the presence of aluminum at high temperatures affords crystalline boron. 1

Packaging

5 g in poly bottle
Packaged in poly bottles

Pictograms

Health hazard

Signal Word

Danger

Hazard Statements

Precautionary Statements

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves

RIDADR

NONH for all modes of transport

WGK Germany

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis
Certificate of Origin
Yinling Wang et al.
Analytical biochemistry, 385(1), 184-186 (2008-11-27)
Glassy carbon electrode modified with boron oxide nanoparticles supported on multiwall carbon nanotubes was obtained via a facile approach. The as-prepared modified electrode exhibits excellent electrocatalytic activity toward the redox of glucose in pH 7.0 phosphate buffer solution. The electrochemical...
Xiaofeng Liu et al.
Chemical communications (Cambridge, England), (27)(27), 4073-4075 (2009-07-02)
A facile strategy based on the reaction of urea and boric acid is developed for the synthesis of toxicity-free BCNO nanocrystals containing carbon impurities and which exhibit efficient multi-color fluorescence under both single-photon and two-photon excitation.
V Simon et al.
Journal of materials science. Materials in medicine, 18(3), 507-512 (2007-03-06)
Quaternary Ag(2)O-CaO-Bi(2)O(3)-B(2)O(3) glasses and glassceramics are investigated with regard to release behaviour and local structure. The dissolution behaviour in water and physiological serum shows that the cations are released rapidly or gradually and points out a multi-step process, generally characterised...
Pratik Koirala et al.
The journal of physical chemistry. A, 117(6), 1310-1318 (2012-11-03)
Using density functional theory based calculations, we have systematically studied the equilibrium geometries, relative stabilities, and electronic and magnetic properties of Fe and Mn atoms interacting with a varying number of BO(2) moieties. These clusters are found to exhibit hyperhalogen...
Noelio O Dantas et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 81(1), 140-143 (2011-07-19)
The structural properties of the glass matrix 40SiO(2)·30Na(2)O·1Al(2)O(3)·(29-x)B(2)O(3)·xFe(2)O(3) (mol%), 0.0≤x≤29.0 were studied by X-ray diffraction (XRD), differential thermal analysis (DTA) and Raman and infrared spectroscopy (FT-IR). XRD demonstrated Fe(3)O(4) crystal formation for Fe(2)O(3) concentrations of 29.0 mol%. DTA showed that...

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