Description

Buy Propionic anhydride Cas 123-62-6

Buy Propionic anhydride Cas 123-62-6.

Synonyms: Propanoic acid, 1,1′-anhydride, Propanoic acid, anhydride (9CI), Propionic anhydride (6CI,8CI), Methylacetic anhydride, Propanoic anhydride, Propanoyl propanoate, Propionic acid anhydride, Propionyl anhydride, Propionyl oxide

Propionic anhydride is an organic compound with the formula (CH₃CH₂CO)₂O. This simple acid anhydride is a colourless liquid. It is a widely used reagent in organic synthesis as well as for producing specialty derivatives of cellulose.^[1]

Industrial route to propionic anhydride involves thermal dehydration of propionic acid, driving off the water by distillation:

2 CH₃CH₂CO₂H → (CH₃CH₂CO)₂O + H₂O

Another routes is the Reppe carbonylation of ethylene with propionic acid and nickel carbonyl as the catalyst:^[1]

CH₂=CH₂ + CH₃CH₂CO₂H + CO → (CH₃CH₂CO)₂O

Propionic anhydride has also been prepared by dehydration of propionic acid using ketene:^[2]

2 CH₃CH₂CO₂H + CH₂=C=O → (CH₃CH₂CO)₂O + CH₃CO₂H

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