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Boron trioxide

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Boron trioxide
Image:Boron-trioxide-3D-balls.png
General
Other names Diboron trioxide,
Boric acid,
Boric oxide.
Molecular formula B2O3.
Molar mass 69.6182 g/mol
Appearance Colorless, glassy solid.
CAS number [[1303-86-2] [1]]
EINECS number 2151258
Properties
Density and phase 2.460 g.cm-3, liquid
Solubility in water 2.2 g/100 g H2O
Solubility in alcohol Soluble
Solubility in ether N/A
Melting point 450°C
Boiling point 1860°C
Acidity (pKa) N/A
Structure
Molecular shape N/A
Dipole moment N/A
Hazards
MSDS External MSDS
EU classification N/A
R-phrases N/A
S-phrases N/A
PEL (US, OSHA) N/A
IDLH (US, NIOSH) N/A
Flash point N/A
Autoignition temperature N/A
Explosive limits in air N/A
RTECS number N/A
Supplementary data page
Structure & properties n, εr, etc.
Thermodynamic data Phase behaviour
Solid, liquid, gas
Spectral data UV, IR, NMR, MS
Related compounds
Other anions None
Other cations None
Related compounds None
Except where noted otherwise, data are given for
materials in their standard state (at 25°C, 100 kPa)
Infobox disclaimer and references

Boron oxide is an odourless, colourless or white solid, also known as diboron trioxide, formula B2O3.

Contents

[edit] Applications


[edit] Hazard Information

[edit] Data

The standard enthalpy of formation of boron trioxide at 25oC:

  • in crystalline phase -302 kilo-cal/grm.mole
  • in glassy phase -297.6 kilo-cal/grm.mole

The standard free energy of formation of boron trioxide at 25oC:

  • in crystalline phase -283 kilo-cal/grm.mole
  • in glassy phase -280 kilo-cal/grm.mole

[edit] External links

es:Trióxido de boro vi:Ôxít bo

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