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Benzoic acid
from class:
Microbiology
Definition
Benzoic acid is a colorless crystalline solid and a simple aromatic carboxylic acid. It is widely used as a preservative in food and beverages due to its antimicrobial properties.
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5 Must Know Facts For Your Next Test
- Benzoic acid inhibits the growth of mold, yeast, and some bacteria by disrupting their cellular metabolism.
- It is most effective in acidic conditions (pH 2.5-4.0) where it can easily penetrate microbial cell walls.
- Commonly used concentrations of benzoic acid in food preservation range from 0.05% to 0.1%.
- While generally recognized as safe, excessive consumption of benzoic acid can lead to health issues such as irritation of the digestive tract.
- Benzoic acid is often combined with other preservatives like sorbic acid for synergistic effects in controlling microbial growth.
Review Questions
- What types of microorganisms are most affected by benzoic acid?
- Why is benzoic acid more effective in acidic conditions?
- What are common concentrations of benzoic acid used in food preservation?
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