has role is protonated form of propionate saturated fatty acid short-chain fatty acid propionic acid ethylformic acid PROPANOIC ACID propanoic acid A short-chain saturated fatty acid comprising ethane attached to the carbon of a carboxy group. carboxyethane Propanoic acid Propionic acid propioic acid CHEBI:26304 CHEBI:45227 metacetonic acid PA pseudoacetic acid methylacetic acid propanoic acid Propanoic acid CHEBI:8476 PROPANOIC ACID acide propanoique Propionsaeure acide propionique ethanecarboxylic acid propoic acid CH3-CH2-COOH propionic acid antifungal drug