Reference Document · May 2026 · For laboratory personnel
Research Use Only. These guidelines are provided for qualified laboratory personnel handling research reference materials in non-clinical laboratory settings. This document does not constitute reconstitution, administration, or usage guidance of any kind.
Temperature Storage Requirements
| Material Type | Recommended Storage | Notes |
|---|---|---|
| Lyophilized peptides (sealed) | −20°C | Desiccated, light-protected |
| Lyophilized peptides (opened) | −20°C | Re-seal with desiccant immediately after use |
| Long-term archival | −80°C | For retention beyond 24 months |
| Shipping transit | Cold chain (gel packs) | Insulated packaging and gel ice |
Lyophilized Peptide Handling
Lyophilized (freeze-dried) peptides are supplied as white to off-white powders in sealed vials. The lyophilization process removes water under vacuum, yielding a stable powder that is hygroscopic and sensitive to humidity, heat, and light.
Upon Receipt: Allow sealed vials to equilibrate to room temperature before opening to prevent condensation. Do not open vials while cold. Transfer to appropriate storage conditions immediately after inventory.
During Laboratory Use: Remove vials from cold storage and allow to reach room temperature before opening. Minimize exposure time. Work in a low-humidity environment. Reseal vials immediately after use.
Stability Considerations
Primary degradation pathways for lyophilized peptides include:
- Oxidation — methionine, cysteine, tryptophan residues susceptible; minimize oxygen exposure
- Hydrolysis — maintain anhydrous conditions
- Deamidation — asparagine and glutamine residues; temperature and pH dependent
- Aggregation — avoid temperature cycling and mechanical stress