BLES® (bovine lipid extract surfactant) has a shelf life of 36 months when stored frozen below -10°C. Do not use past expiry date on label. Store vials in cartons until ready to use. Frozen product may have two excursions to 2°-8°C for a combined maximum of two weeks. Alternately, BLES® may be stored refrigerated (2°– 8ºC) upon receipt, for up to 10 months. In the space provided on the vial labelling, record the new expiry date of up to 10 months from the day it is received. Refrigerated vials should not be returned to the freezer. An unopened vial warmed to room temperature for less than 6 hours, may be returned to its previous storage condition a maximum of 2 times. In the space provided on the vial labelling, record the number of times the vial has been warmed and returned to storage.