Trifluoroacetic anhydride (TFAA) is the acid anhydride of trifluoroacetic acid. It is the perfluorinated derivative of acetic anhydride. Like many acid anhydrides, it may be used to introduce the corresponding trifluoroacetyl group. The corresponding acyl chloride, trifluoroacetyl chloride, is a gas, making it inconvenient to work with. Trifluoroacetic anhydride is the recommended desiccant for trifluoroacetic acid.
Appearance & Physical State
colourless liquid
Density
1.641
Melting Point
-63.5ºC
Boiling Point
38-40ºC
Flash Point
-26ºC
Refractive Index
1.269
Water Solubility
Hydrolysis
Stability
Stable, but moisture sensitive. Reacts with water to liberate hydrogen (flammable). Incompatible with water, strong oxidizing agents.
