peracetic

Peracetic acid, also called peroxyacetic acid, is a colorless liquid with a sharp, vinegar-like odor. It is a peroxy acid formed by combining acetic acid with hydrogen peroxide and has the chemical formula CH3COOOH. It is a strong oxidizer and is widely used for its antimicrobial properties, effective against bacteria, yeasts, and molds. In water, peracetic acid decomposes to acetic acid, water, and oxygen, a reaction that is accelerated by heat, metals, or organic material. Its stability depends on pH and temperature; it is typically stored as an acidic, stabilized aqueous solution and can react vigorously with organics and reducing agents.

Production and handling: In practice, peracetic acid is often generated in situ by reacting acetic acid with hydrogen peroxide under acidic conditions, sometimes with a catalyst. Commercial products are sold as stabilized aqueous formulations, commonly containing around 5–15% active peracetic acid, with higher or lower concentrations used in specialized industrial applications. Because of its oxidizing nature, it can corrode some metals and reacts with flammable materials. Storage requires tightly closed, vented containers kept away from heat, light, and incompatible substances. Handling should involve appropriate personal protective equipment, including gloves, goggles, and protective clothing.

Uses: It is widely employed as a disinfectant and sterilant in the food and beverage industry, on medical devices and in pharmaceuticals, in sanitation for cleaning-in-place systems, and in wastewater or surface sanitation. Its rapid action at low temperatures makes it suitable for sensitive environments and equipment. It is regulated as a disinfectant or sterilant in many jurisdictions, reflecting safety and environmental considerations.

Safety and environmental impact: Peracetic acid is corrosive and irritant to skin, eyes, and the respiratory tract. It degrades relatively quickly in the environment to non-toxic end products, but spills require prompt containment and proper disposal according to local regulations.