Lyophilized peptides are most stable when kept dry and at low temperature. For long-term storage, place vials in a -20 °C or -80 °C freezer that is not subject to frequent door openings. Use airtight, low-moisture secondary containers such as sealed zip-lock bags with desiccant packs to guard against condensation when the freezer cycles.
Refrigerator storage
If you need to access peptides regularly, a 2-8 °C refrigerator is a practical compromise. Store the vials in a dedicated, low-humidity compartment and avoid placing them near the door or in the light-exposed area of the fridge. Replace desiccant packs periodically and monitor for any signs of moisture, such as clumping or a change in texture.
Bench and short-term storage
For short-term work on the bench, keep the lyophilized material in a desiccator or a sealed container with a fresh desiccant packet. Keep the container away from direct sunlight, heat sources, and high humidity. Limit the time the vial is open to a few minutes and reseal promptly to prevent water uptake.
Moving between storage conditions
When moving samples between storage conditions, allow the vials to equilibrate to room temperature inside a sealed container before opening. This prevents rapid condensation on the peptide powder. Record the storage location, temperature, and date of each transfer in your lab notebook to maintain traceability and ensure reproducibility of experiments.
For research use only. This guide covers bench handling of laboratory research materials. It does not describe an application, benefit, dose, route or outcome, and nothing in it is guidance for use in a person or an animal. Nothing sold by PepXtide has been evaluated by the FDA.