Scripps Laboratories

Hormone Storage & Stability

Purified 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.

  1. The product should be stored frozen below -10°C in a non-cycling freezer.
  2. 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. 
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, then stored frozen.

Technical Info

Hormone Data