Laboratory Reference
Handling & Storage
Standard guidance for the laboratory handling, reconstitution, and storage of research peptides.
Receiving & Inspection
- Inspect packaging on arrival for integrity, vial seal, and visible damage.
- Confirm the lot number on the vial matches the accompanying Certificate of Analysis.
- Place lyophilized vials in refrigerated or frozen storage promptly.
Storage Conditions
| State | Temperature | Typical Stability |
|---|---|---|
| Lyophilized — long term | −20°C (frozen) | 12–24 months |
| Lyophilized — short term | 2–8°C (refrigerated) | Several weeks |
| Reconstituted | 2–8°C (refrigerated) | ~14–28 days, peptide-dependent |
| Working aliquots | −20°C single-use | Avoid repeated freeze–thaw |
Values are general reference points. Always defer to lot-specific COA notes.
Reconstitution (General Protocol)
- Allow vials to equilibrate to room temperature before opening.
- Disinfect the vial septum with an alcohol prep swab.
- Draw the required volume of bacteriostatic water (0.9% benzyl alcohol) or sterile water.
- Inject the diluent slowly down the inner wall of the vial — do not inject directly onto the powder.
- Swirl gently to dissolve. Do not shake.
- Allow the solution to settle until clear and free of visible particulates.
- Label the vial with date of reconstitution and concentration.
Stability Considerations
- Protect from direct light, heat, and humidity at all times.
- Avoid more than 2–3 freeze–thaw cycles for reconstituted material.
- Discard reconstituted solutions that become cloudy, discolored, or develop visible precipitate.
- Bacteriostatic water vials should be discarded 28 days after first puncture.
Documentation
A Certificate of Analysis (COA) is available on request for each lot, documenting identity by mass spectrometry and purity by HPLC. Independent third-party verification is performed on every lot.