Storage basics for lyophilized research peptides
General laboratory guidance on temperature, light, moisture, and reconstitution hygiene.
ALORA Editorial · June 22, 2026
A lyophilized (freeze-dried) peptide is supplied as a dry powder because it is far more stable that way than in solution. The goal of storage is simple: keep the material as close as possible to the state it was in when it was tested.
Temperature
Lyophilized peptides are commonly stored frozen, typically at −20 °C, for long-term keeping. Avoid repeated temperature cycling — moving a vial in and out of the freezer is harder on the material than steady cold storage.
Light and moisture
Keep vials sealed, dry and away from direct light until use. Moisture is the main enemy of a lyophilized powder, so let a cold vial reach room temperature before opening it; opening it cold draws condensation onto the powder.
After reconstitution
Once returned to solution, a peptide is much less stable. Laboratories typically refrigerate reconstituted material at 2–8 °C, divide it into aliquots so the whole volume isn’t repeatedly warmed and cooled, and avoid repeated freeze–thaw cycles.
Follow the specific guidance
This is general guidance for research peptides. Always follow the storage conditions listed on each product page and lot record, and your own laboratory’s SOPs, which take precedence.
Reference information for laboratory research only. It is not guidance on human or veterinary use and has not been evaluated by the FDA.