Lyophilized although stable at room temperature for 3 weeks, should be stored desiccated below -20C. Upon reconstitution IL-3 should be stored at 4C between 2-7 days and for future use below -20C.Aliquot to avoid repeated freezing and thawing._x005F_x005F_x005F_x000D__x005F_x000D_For long term storage it is recommended to add a carrier protein (0.1% HSA or BSA).