propanoic anhydride

100%

propanoic anhydride, propanoic anhydride, propanoyl propanoate, propionic anhydride

Propanoic anhydride is a colorless liquid with a strong smell. The compound causes burns and the fumes damage eyes and lungs. Immediately reacts to propanoic acid in water. It's a precursor for fentanyl.

Space reserved for ads

Physical characteristics

Molecular mass	130
Density	1.02 kg/m³
Melting point	-42.1 ℃-43.9 ℉231 K
Boiling point	168 ℃335 ℉442 K

Reactions using propanoic anhydride

propanoic anhydride + water → propanoic acid
propanoic anhydride + phenol → phenyl propanoate + propanoic acid
propanoic anhydride + propan-2-ol → propan-2-yl propanoate + propanoic acid
propanoic anhydride + ethanol → ethyl propanoate + propanoic acid
propanoic anhydride + methanol → methyl propanoate + propanoic acid

Synthesis of propanoic anhydride

propanoic acid + propanoyl chloride → propanoic anhydride + hydrogen chloride
propanoic acid + phosphorous pentoxide → propanoic anhydride + phosphoric acid

Compound added to the database on December 1, 2020, last modified on September 3, 2022.