Storage Guidelines for Lyophilized Research Peptides
Proper storage is critical for maintaining the integrity and stability of research peptides. All products sold by ACCUTIDE Research Supply are supplied in lyophilized (freeze-dried) form. Here are the storage requirements you need to know.
Lyophilized peptide storage (unopened vials)
After reconstitution
Once a lyophilized peptide has been reconstituted with bacteriostatic water or sterile solvent, its stability window decreases significantly. Reconstituted peptide solutions are more vulnerable to degradation from temperature, light, repeated freeze-thaw cycles, and microbial contamination.
Store at 2–8°C (standard refrigerator). Keep sealed and away from light.
Aliquot into single-use volumes and freeze at −20°C. Avoid freeze-thaw cycling of aliquots.
Bacteriostatic water (0.9% benzyl alcohol) is preferred — the preservative extends refrigerated stability compared to sterile water.
Use low-adsorption glass or polypropylene vials. Some peptides (especially cysteine-containing sequences) can adsorb to surfaces.
Shipping and receipt
Upon receipt, transfer vials to your −20°C freezer as soon as possible. Brief ambient temperature exposure during shipping does not typically compromise lyophilized peptide integrity, but prolonged exposure should be avoided.
Signs of degradation to watch for
- Discoloration of the lyophilized powder (beyond the expected off-white to pale yellow range)
- Cloudiness or visible particulates in reconstituted solution that do not clear on warming
- Unusual odour upon reconstitution
- Unexpected loss of potency in assay results (verify against COA values)
Related guides: How to read a COA · Browse research peptides