How do you dispose of peracetic acid?

How to Safely Dispose of Peracetic Acid

Peracetic acid is a powerful disinfectant commonly used in healthcare and laboratory settings, but its disposal requires care to avoid hazardous exposure. If you're handling this chemical, especially outside of a ventilated cabinet, safety is crucial. Should you need to dispose of a solution containing peracetic acid and hydrogen peroxide, the first step is to neutralize it properly.

Never pour peracetic acid down the drain without neutralization. A common method involves using sodium bicarbonate (baking soda) to neutralize the mixture. After adding the bicarbonate, wait at least five minutes to ensure the chemical reaction is complete. This pause allows the solution to stabilize and reduces the risk of fumes or splashing.

Once neutralized, the liquid can be safely poured down the drain. However, always run cool water while doing so. The steady flow helps flush the residue and prevents any lingering concentration in the pipes. Avoid using hot water, as it can volatilize residual chemicals and create inhalation hazards.

It’s also important to leave the area immediately if ventilation is inadequate. Peracetic acid vapors can irritate the eyes, skin, and respiratory system, so stepping out of the room during neutralization and disposal minimizes exposure. Always wear appropriate PPE—gloves, goggles, and a lab coat—when handling or disposing of such chemicals.

Proper disposal isn’t just about compliance—it’s about protecting people and plumbing. By following a careful, step-by-step approach, you ensure both safety and environmental responsibility in the workplace.