Peptide Stability: Lyophilized vs. Reconstituted

The stability of synthetic peptides is a critical variable in generating reproducible research data. Lyophilization—the process of freeze-drying—creates a solid puck that is highly stable under controlled conditions.

Lyophilized Storage Parameters

When maintained at -20°C in a dark environment, most lyophilized peptides can retain >98% purity for up to 36 months. At standard refrigeration (2°C to 8°C), this stability is typically preserved for 12-24 months.

Reconstitution Dynamics

Upon reconstitution with bacteriostatic water or sterile saline, the compound becomes significantly more vulnerable to enzymatic degradation, hydrolysis, and oxidation. The general rule of thumb for reconstituted peptides is to maintain them at 2°C to 8°C and utilize the solution within 30 days.