For research use only. All compounds discussed are research chemicals not approved by the FDA for human use. Not for human consumption.
Why Proper Peptide Storage Is Critical to Research Integrity
Synthetic peptides are susceptible to degradation from heat, light, moisture, and repeated freeze-thaw cycles. Improper storage conditions can lead to partial or complete loss of biological activity, confounding experimental results. This guide outlines best practices for storing research-grade peptides in both lyophilized and reconstituted states.
Lyophilized (Dry Powder) Storage
Lyophilized peptides are the most stable form for long-term storage. Under the right conditions, most peptides remain viable for 12–24 months or longer as lyophilized powder.
- Primary storage temperature: -20°C (standard laboratory freezer)
- Preferred storage: -80°C for long-term archiving of sensitive peptides
- Desiccation: Store vials with desiccant or in a sealed container to prevent moisture absorption, which can cause clumping and degradation
- Light protection: Store in opaque containers or in the dark; UV exposure degrades many peptide bonds
- Do not: Store at room temperature for extended periods, or allow repeated warming and re-freezing of lyophilized stock
Reconstituted Peptide Storage
Once reconstituted with bacteriostatic water, peptides have a significantly shorter usable window. General guidelines:
- Refrigerated (2–8°C): Up to 28 days when reconstituted in bacteriostatic water (0.9% benzyl alcohol)
- Do not freeze reconstituted solutions: Freeze-thaw cycles cause aggregation, peptide bond hydrolysis, and loss of activity
- Protect from light: Wrap vials in foil or store in a dark refrigerator compartment
- Label every vial: Record compound name, lot number, concentration, reconstitution date, and researcher initials
Peptide-Specific Storage Notes
| Peptide | Lyophilized Storage | Reconstituted Shelf Life | Notes |
|---|---|---|---|
| BPC-157 | -20°C, 24+ months | 28 days at 2–8°C | Reconstitute in bacteriostatic water |
| TB-500 | -20°C, 24+ months | 28 days at 2–8°C | Reconstitute separately from BPC-157 |
| CJC-1295 | -20°C, 18–24 months | 21–28 days at 2–8°C | Sensitive to pH; avoid acidic solvents |
| Ipamorelin | -20°C, 24+ months | 28 days at 2–8°C | Stable; standard bacteriostatic water |
| Semaglutide | -20°C, 24 months | 28 days at 2–8°C | Store away from direct light |
| Tirzepatide | -20°C, 24 months | 21–28 days at 2–8°C | Handle with sterile technique |
| Epitalon | -20°C, 24+ months | 28 days at 2–8°C | Highly stable peptide |
| GHK-Cu | -20°C, 12–18 months | 14–21 days at 2–8°C | Copper peptide; can oxidize; use promptly |
Signs of Peptide Degradation
Researchers should visually inspect reconstituted peptide solutions before use. Discard any sample that shows: visible particulates or cloudiness in a previously clear solution, unexpected color changes, strong or unusual odors, or vials that were improperly sealed or stored. When in doubt, do not use the sample in research — source fresh, verified stock from Iron Labs.
Iron Labs Packaging & COA
Iron Labs ships all research peptides in sealed, vacuum-crimped vials with desiccant where applicable. Each shipment includes batch-specific COA documentation confirming HPLC purity and mass spec identity at time of manufacture. Proper handling from our facility to your lab is built into our packaging protocol.
Order research peptides with verified purity → Iron Labs Research Catalog
Regulatory Notice
All peptides sold by Iron Labs are research chemicals for laboratory use only. Not approved by the FDA for human or veterinary use. Not drugs, supplements, or food products.