Can FBS be used longer than the expiration date?
Possibly. While we guarantee FBS from five years from the date of processing, it is most likely viable for several years past that, assuming that it has been stored properly (at -20°C or below), and not subject to multiple thawing/refreezing cycles. We recommend that you performance-test the FBS before usage to confirm viability. If you do not have a protocol for doing so, please contact us for one. In addition, while is is not necessary for unopened and properly stored FBS, you may also consider sterile re-filtration (0.1 um) before performance-testing, especially if storage and handling conditions are uncertain.
