| Trifluoroacetic anhydride | |
|---|---|
|
trifluoroacetic anhydride |
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| Identifiers | |
| CAS number | 407-25-0 |
| PubChem | 9845 |
| Jmol-3D images | Image 1 |
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| Properties | |
| Molecular formula | C4F6O3 |
| Molar mass | 210.03 g mol−1 |
| Density | 1.487 g/mL |
| Melting point |
-65 °C, 208 K, -85 °F |
| Boiling point |
40 °C, 313 K, 104 °F |
| Hazards | |
| MSDS | Oxford MSDS |
| EU classification | Harmful (Xn); Corrosive (C) |
| (verify) (what is: /?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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| Infobox references | |
Trifluoroacetic anhydride (TFAA) is the acid anhydride of trifluoroacetic acid. In particular, trifluoroacetic anhydride is the perfluorinated derivative of acetic anhydride. Like many acid anhydrides, it may be used to introduce the corresponding trifluoroacetyl group. The corresponding trifluoroacetyl chloride, is a gas, making it inconvenient to work with. Trifluoroacetic anhydride is the recommended desiccant for trifluoroacetic acid.[1]
Trifluoroacetic anhydride may be prepared from trifluoroacetic acid by dehydrating with excess α-halogenated acid chlorides. For example, with dichloroacetyl chloride:[2]