Peracetic acid
Peracetic acid (also known as peroxyacetic acid, or PAA), is a organic compound with the formula CH3CO3H. This organic peroxide is a colorless liquid with a characteristic acrid odor reminiscent of acetic acid. It can be highly corrosive, and is a powerful oxidizing agent.
Production
Peracetic acid is produced industrially by the autoxidation of acetaldehyde.
- CH3CHO + O2 → CH3CO3H
It forms upon treatment of acetic acid with hydrogen peroxide, especially in the presence of sulfuric acid:
- CH3CO2H + H2O2 → CH3CO3H + H2O
Applications
Peracetic acid is a versatile oxidizing agent that has found use in a variety of applications. It is mainly available in solutions of acetic acid and hydrogen peroxide, with these solutions containing up to 40% peracetic acid by weight.
Disinfectant and biocide
Peracetic acid is used mainly in the food industry, where it is applied as a disinfectant. It is also used for the disinfection of medical supplies, to prevent biofilm formation in pulp industries, and as a water disinfectant. It is also used in the dairy industry for milk production.
Bleaching
Peracetic acid is used for the bleaching of textiles, paper, and in the chemical industry.
Safety
Peracetic acid is a strong oxidizer and can be highly corrosive. It can cause irritation to the skin, eyes, and respiratory system. It is classified as a hazardous substance in many countries, and its use is regulated.
See also
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