Triethyl borate

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Triethyl borate
Names
IUPAC name
Triethyl borate
Other names
Boric acid, triethyl ester
Boron triethoxide
Triethoxyborane
Properties
C6H15BO3
B(C2H5O)3
Molar mass 145.99 g/mol
Appearance Clear liquid
Density 0.858 g/cm3
Melting point −85 °C (−121 °F; 188 K)
Boiling point 118 °C (244 °F; 391 K)
Reacts
Solubility Reacts with carboxylic acids
Soluble in methanol
Hazards
Safety data sheet Sigma-Aldrich
Flash point 11 °C
Related compounds
Related compounds
Trimethyl borate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Triethyl borate an ester of boric acid and ethanol, a colorless, flammable liquid with the formula B(C2H5O)3.

Properties

Chemical

Triethyl borate burns in air with a green flame, releasing carbon dioxide, water vapors and boron oxide/boric acid fumes.

Physical

Triethyl borate is a colorless liquid, which slowly hydrolyzes in water and miscible with many organic solvents, like alcohols.

Availability

Triethyl borate is sold by chemical suppliers.

Preparation

Triethyl borate can be prepared by adding anhydrous ethanol with boric acid or boron trioxide. Can be purified via distillation.

Projects

  • Make green flame
  • Purify boric acid

Handling

Safety

Triethyl borate readily hydrolyzes in water and this makes it irritant to skin, eyes and mucous tissue.

Storage

Triethyl borate should be stored in closed bottles, in a dry medium, such a glovebox or desiccator.

Disposal

Triethyl borate can be safely burned. It will hydrolyze in water to yield ethanol and boric acid, which pose low toxicity to the environment and don't require special disposal.

References

Relevant Sciencemadness threads