S40™ Sterilant Concentrate is for use in the SYSTEM 1E ™ Processor ONLY S40™ Sterilant Concentrate is a single use peracetic acid chemistry for the liquid chemical sterilization of validated cleaned, immersible, reusable, critical and semi-critical heat sensitive medical devices. The sterilant can be used only with the SYSTEM 1E™ Processor. There are no special ventilation requirements, and the use dilution is discharged safely down the drain.