An aqueous disinfectant solution comprising peroxyacetic acid and a surfactant such as a polyoxyethylene alkyl ether phosphate, (polyethylene glycol p-(1,1,3,3-tetramethylbutyl)-phenyl ether) or cocoamidopropylamino oxide. The solution is preferably adjusted to provide a pH in the range 5-8 by a pH adjusting agent such as a phosphate buffer； hydroxide； carbonate； bicarbonate； a combination of carbonate and hydroxide； or a combination of carbonate and bi carbonate.
