What is the shelf life of Cyanokit 5 g (hydroxocobalamin) powder before reconstitution?

Cyanokit 5 g (hydroxocobalamin) powder has a 3-year shelf life before reconstitution; for ambulatory use, permitted temporary exposures are 15 days at 5–40°C (usual transport), 4 days at 5–60°C (desert transport), or 15 days at −20–40°C (freezing/defrosting cycles), and it must be discarded if these limits are exceeded.