What is "peracetic acid"

n. (context organic compound English) The peroxy- derivative of acetic acid CH₃-CO-OOH; it is a powerful oxidizing agent and disinfectant though can be explosive

Peracetic acid (also known as peroxyacetic acid, or PAA), is an organic compound with the formula CHCOH. This organic peroxide is a colorless liquid with a characteristic acrid odor reminiscent of acetic acid. It can be highly corrosive.

Peracetic acid is a weaker acid than the parent acetic acid, with a pK of 8.2.