Propionic acid

Definition

Propionic acid is a naturally occurring carboxylic acid with antimicrobial properties. It is commonly used as a preservative in food and pharmaceuticals to inhibit the growth of mold and bacteria.

5 Must Know Facts For Your Next Test

1. Propionic acid is effective against mold and some bacteria, making it useful as a preservative.
2. It is produced by certain bacteria during fermentation, notably Propionibacterium species.
3. In microbiology, it can be used to control microbial growth in various settings, including food preservation.
4. Propionic acid disrupts cellular processes in microorganisms, leading to their inhibition or death.
5. It has a pungent odor and is also found naturally in sweat and human skin.

Review Questions

• What types of microorganisms are most effectively inhibited by propionic acid?
• Which bacterial genus is known for producing propionic acid during fermentation?
• How does propionic acid affect microbial cells?

Related terms

Carboxylic Acid: An organic compound containing a carboxyl group (COOH).

Preservative: A substance used to prevent the decay or spoilage of food, pharmaceuticals, and other materials.

Antimicrobial Agent: A substance that kills or inhibits the growth of microorganisms.