Trimethyl borate

Trimethyl borate
Names
	IUPAC name Trimethyl borate
	Other names Trimethoxyborane
Identifiers
CAS Number	121-43-7 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:38913 ;
ChemSpider	8157 ;
ECHA InfoCard	100.004.063
EC Number	204-468-9;
PubChem CID	8470;
UNII	82U64J6F5N ;
CompTox Dashboard (EPA)	DTXSID0037738 ;
	InChI InChI=1S/C3H9BO3/c1-5-4(6-2)7-3/h1-3H3 Key: WRECIMRULFAWHA-UHFFFAOYSA-N ; InChI=1/C3H9BO3/c1-5-4(6-2)7-3/h1-3H3 Key: WRECIMRULFAWHA-UHFFFAOYAY;
	SMILES O(B(OC)OC)C;
Properties
Chemical formula	C3H9BO3
Molar mass	103.91 g·mol−1
Appearance	colourless liquid
Density	0.932 g/ml
Melting point	−34 °C (−29 °F; 239 K)
Boiling point	68 to 69 °C (154 to 156 °F; 341 to 342 K)
Solubility in water	decomposition
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	flammable
Related compounds
Other cations	Trimethyl phosphite; Tetramethyl orthosilicate
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Trimethyl borate is the organoboron compound with the formula B(OCH₃)₃. It is a colourless liquid that burns with a green flame. It is an intermediate in the preparation of sodium borohydride and is a popular reagent in organic chemistry. It is a weak Lewis acid (AN = 23, Gutmann-Beckett method).

Borate esters are prepared by heating boric acid or related boron oxides with alcohols under conditions where water is removed by azeotropic distillation.