Purified pituitary hormones that have been lyophilized and sealed under vacuum or with dry nitrogen
are very stable when stored below -10°C, generally showing little loss in activity even after 5 years
or more of storage. Still, certain steps will help ensure the longest possible shelf life of the product.
- The product should be stored frozen below -10°C in a non-cycling freezer.
- The material should be equilibrated to ambient room temperature prior to opening the vial. If a weighed
quantity of dry powder is to be removed, the vial must be opened in a dry room. If it is to be used repeatedly,
the powder should be subdivided into aliquots, resealed, and stored below -10°C. Please note:
it is very difficult to aliquot hormones by dry weight. To improve consistency, it is suggested that
the entire vial be resuspended in an appropriate buffer, aliquoted by volume, and stored frozen.
