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Propionic Acid Chemical Properties
As a typical carboxylic acid, propionic acid exhibits the general properties of acids. It undergoes neutralization reactions with bases to form propionates, such as sodium propionate and calcium propionate. The pKa value of propionic acid is 4.88, meaning it exists primarily in its molecular form under near-neutral conditions, which is critical to its antimicrobial activity. Additionally, propionic acid can undergo esterification reactions to form propionate esters with fruity aromas, which are widely used in the fragrance industry.