In order to extend the shelf-life of salts, buffer ingredients, and embedding components (which do not need to be refrigerated), we recommend that you store them in desiccators, where the humidity is controlled.

The hydrated salts are always more stable than the anhydrous ones. For instance, Sodium Phosphate Dibasic Anhydrous is less stable than Sodium Phosphate Dibasic Dihydrate or Heptahydrate.