Peracetic Acid has three active compounds; hydrogen peroxide (H2 O2 ), acetic acid, and peracetic acid (PAA). PAA is formed by the reaction of acetic acid and H2 O2 with the addition of a catalyst; these compounds exist in equilibrium and their eventual decomposition results in oxygen, carbon dioxide, and water. The history of PAA is quite honestly a little boring. It was introduced as an antibacterial agent in 1955 and has been used in specialized applications since then. Many dialysis centers use PAA to clear bioburden from their internal components on a dialysis machine. Itwasnotuntilthelate90’s“fogging” or creating a vapor became more and more noticed in the “clean-room” industry. Somebody, somewhere realized that the vapor coming off of the aqueous form of this stuff is just as efficacious as the aqueous form.
Although hydrogen peroxide and vinegar provide antimicrobial activity on their own.