Lyophilized material should be kept at 4°C until rehydrated and will remain stable for a minimum of 1 year. Rehydrate by adding 1.0 mL of reagent quality water to the product vial. Store the liquid solution at 4°C for up to one week; thereafter, aliquots should be prepared and stored frozen. Stable for a minimum of 1 year at -20°C, but multiple freeze-thaw cycles should be avoided.