Cas Number


Other Names

Triethoxymethane, Ethyl orthoformate

The formula



Triethyl orthoformate is an organic compound with the formula HC(OC2H5)3. It is a colorless volatile liquid. It is orthoester of formic acid. Commercially available, the industrial synthesis is from hydrogen cyanide and ethanol.

Physical and Chemical Properties
Physical state and Appearance : Colorless liquid
Odor : Pungent
Color : Colorless. Clear
Boiling Point : 143°C (289.4°F)
Melting Point : -76°C (-104.8°F)
Specific Gravity : 0.891 (Water = 1)
Vapor Density : 5.11 (Air = 1)
Vapor Pressure : 0.4 kPa (@ 20°C)
Solubility : Soluble in cold water, diethyl ether. Solubility in Water: 1.35 g/l (decomposes). Soluble in alcohol.
Purity % : 99 min
Ethanol % : 0.4
Methyl Formate % : 0.1

1. Triethyl Orthoformate (TEOF) is as organic intermediate for pharmaceutical.

2. Triethyl Orthoformate (TEOF) is the material of synthesizing antimalarial chloroquine and quinoline piperazine.

3. Triethyl Orthoformate (TEOF) can also be used in polymers, photographic chemicals, antihalation dyes and agrochemical.