What is the common name for peracetic acid?

What Is Peracetic Acid?

Peracetic acid, also known as peroxyacetic acid or by the brand name Percidine, is a powerful organic compound with the chemical formula CH3CO3H. It’s most commonly recognized for its sharp, pungent smell—similar to vinegar—due to its structural relationship with acetic acid. In its pure form, it appears as a colorless liquid, but don’t let its simple appearance fool you: this substance is highly reactive and corrosive.

Unlike regular acetic acid (the main component in vinegar), peracetic acid contains an extra oxygen atom, which gives it strong oxidizing properties. This makes it incredibly effective as a disinfectant and sterilizing agent, widely used in the food industry, medical facilities, and wastewater treatment. Because it breaks down into harmless byproducts like acetic acid, water, and oxygen, it’s considered environmentally friendly when handled properly.

Despite its usefulness, peracetic acid demands respect. Its corrosiveness means it can damage skin, eyes, and respiratory tissues if not used with proper safety measures. It’s also unstable in concentrated forms, requiring careful storage and handling—usually diluted in equilibrium with acetic acid and hydrogen peroxide.

Whether you call it peracetic acid, peroxyacetic acid, or Percidine, one thing is clear: this compound packs a powerful punch. From sanitizing surgical instruments to ensuring the safety of drinking water, its role in modern hygiene and industrial processes is hard to overstate. Just remember—efficiency comes with caution.