Trimethyl borate

Trimethyl borate

CAS № 121-43-7
EC № 204-468-9
Chemical formula: (CH3O)3B
Mol weight: 103.91
Выпускается по ТУ: 2439-004-10645057-2005
Synonym: Boric acid trimethyl ester, Methyl borate, Trimethoxyborane, TMB

Physical properties:

Colorless transparent liquid, readily flammable, sensitive to moisture.
Boiling point: 68-69 °C.
Density: 0.927 kg/l.
Flash point: –13 °C.


  1. Material for sol-gel production of pure borosilicate glass.
  2. Fire retardant and anticeptic for impregnation of textile, wood and other flammable materials.
  3. Catalyst for selective oxidation of aliphatic hydrocarbons to fatty alcohols.
  4. Polymerization catalyst for vinyl compounds (olefins, vinyl chloride, acrylonitrile and others).



Appearance Colourless liquid
Purity 99.0 % min