Lyophilized IL-1-alpha although stable at room temperature for 3 weeks, should be stored desiccated below -180 degree C. Upon reconstitution Interleukin-3 should be stored at 40C between 2-7 days and for future use below -180 degree C. For long term storage it is recommended to add a carrier protein (0.1% HSA or BSA). Please avoid freeze-thaw cycles.