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Store at -20°C in a freezer Keep away from light and moisture Use desiccant packets where possible Shelf life: typically 12–24 months under proper conditions Bacteriostatic water: Store at 2–8°C for up to 4–6 weeks Sterile water: Use within 72 hours — single use only Do not freeze reconstituted peptide solutions — this can cause aggregation and loss of activity Aliquot your lyophilized peptide into small portions before first use Reconstitute only what you need for a single experiment session Label all vials with peptide name, concentration, date, and initials Monitor for cloudiness or color change — discard if observed Storing at room temperature after reconstitution Using non-sterile water for reconstitution Failing to centrifuge the lyophilized powder before opening (static can cause loss) Ignoring the manufacturer's recommended reconstitution solvent
Lab Protocols 4 min read2024-11-05
Peptide Storage Best Practices for Researchers
Improper storage is one of the most common causes of peptide degradation. Learn the correct protocols for lyophilized and reconstituted peptide storage.
Why Storage Matters
Peptides are sensitive molecules. Improper storage can lead to degradation, aggregation, or loss of biological activity — invalidating your research results and wasting valuable material.
Lyophilized (Freeze-Dried) Peptides
Lyophilized peptides are the most stable form:
Do not repeatedly freeze-thaw lyophilized stock. Prepare working aliquots instead.
Reconstituted Peptides
Once reconstituted, stability decreases significantly:
Recommended Protocol
Common Mistakes
Proper storage discipline is as important as experimental rigor — treat your peptides accordingly.