Peptide Storage Temperature: The Complete Researcher's Reference

Peptide Storage Temperature: The Complete Researcher's Reference

Temperature is the single most important variable in peptide stability. This guide provides clear, practical guidance on optimal storage conditions for both lyophilised and reconstituted research peptides.

Lyophilised Peptide Storage

Lyophilised (freeze-dried) peptides are significantly more stable than reconstituted solutions. Stored at -20°C in a standard laboratory freezer, most peptides remain stable for up to 48 months. At 2-8°C (refrigerator), stability is typically 6-12 months.

Reconstituted Peptide Storage

Once reconstituted, peptides should be stored at 2-8°C and used within the timeframe specified on the product's technical data sheet — typically 2-8 weeks. Avoid repeated freeze-thaw cycles, which cause progressive degradation.

Best Practices

• Aliquot reconstituted peptides before first use to avoid freeze-thaw damage
• Use bacteriostatic water (not sterile water) to extend reconstituted stability
• Label all vials with reconstitution date
• Store away from direct light
• Never store in a self-defrosting freezer (temperature cycling damages peptides)