What are the safety implications of using peracetic acid at a higher concentration than recommended by the manufacturer?

Using peracetic acid at a higher concentration than recommended by the manufacturer poses several safety risks. Peracetic acid is a powerful oxidizing agent used for sanitizing equipment. First, it increases the risk of chemical burns to skin and eyes. Concentrated peracetic acid is corrosive and can cause severe tissue damage upon contact. Proper personal protective equipment (PPE), such as gloves and eye protection, is essential, but using a higher concentration increases the likelihood of accidental exposure and injury severity. Second, it increases the risk of respiratory irritation. Peracetic acid releases acetic acid and hydrogen peroxide vapors, which can irritate the respiratory tract. Higher concentrations increase the vapor concentration, leading to coughing, shortness of breath, and potentially pulmonary edema. Adequate ventilation is crucial, but may not be sufficient at higher concentrations. Third, it elevates the risk of material incompatibility and equipment damage. Peracetic acid can corrode certain materials, such as some metals and plastics. Using a higher concentration accelerates this corrosion, potentially damaging equipment and releasing harmful substances into the production environment. Example: Certain stainless steel alloys can be damaged by prolonged exposure to highly concentrated peracetic acid. Fourth, it increases the risk of fire or explosion. Concentrated peracetic acid is a strong oxidizer and can react violently with organic materials, potentially causing a fire or explosion. Safe handling and storage procedures are critical, but the risk is heightened with increased concentrations. Lastly, it can lead to environmental hazards if not properly neutralized before disposal. Therefore, it is imperative to strictly adhere to the manufacturer's recommended concentration to ensure worker safety, prevent equipment damage, and minimize environmental impact.