Can any one through light on the percentage of Isopropyl alcohol to be used at various areas like disinfecting items before placing them in pass through box, aseptic and non aseptic areas in a sterile dry powder section.Are there any guidelines on this in USFDA,EUGMP, etc.
Using 70% is optimum…less than that you won’t get the same amount of kill…higher than that evaporates too quickly and you won’t get the dwell time.
It has been shown (various white papers, unfortunately, I do not have a reference). That higher concentrations of IPA, does not increase kill or efficacy of the IPA at all, and actually decreases efficacy (maybe due to JH-RYU’s comment). 70% is pretty standard and is super inexpensive and avialable from all sorts of suppliers. Agencies pretty much just accept it.
I wouldn’t spend the time or money to validate difference. Sometimes its not better to challenge assumptions, I think in this case just go with industry standards.