Lyophilization removes water to slow degradation, but storage still matters. Three factors do most of the damage: heat, light and moisture.
Temperature
For long-term storage keep sealed vials at -20°C. Short periods at room temperature — such as during shipping — are generally tolerated by lyophilized peptides, but avoid repeated warming and cooling.
Moisture
Freeze-dried powder readily absorbs water from the air. Always let a cold vial reach room temperature before opening, and close it promptly. Desiccant in the storage container adds a further layer of protection.
Light
Some residues are light-sensitive. Store vials in their box or an opaque container.
After reconstitution
- Refrigerate at 2–8°C
- Avoid repeated freeze–thaw cycles; aliquot if needed
- Record the preparation date on the label
Storage recommendations for each compound are listed in the Compound Information section of its product page.
