Storing lyophilized research peptides: temperature, moisture and light

Lyophilized powder is stable, but only if it stays cold, dry and dark. A short protocol for lab storage.

On arrival

Lyophilized peptides tolerate transit, but should be moved to controlled storage promptly. Check that the cap seal is intact and the lot number matches your paperwork, then log the date received.

Temperature

For longer holds, many laboratories keep lyophilized powder at -20 °C. Short holds at 2 to 8 °C are common for material in active use. Avoid repeated freeze-thaw cycles of any material that has been reconstituted.

Moisture and light

Cold vials that are opened straight from the freezer pull moisture from room air. Let the sealed vial reach room temperature first, keep it in its box, and out of direct light.

This note is general laboratory practice for in-vitro research materials. Products are not for human or veterinary use. Shipping and storage terms are on the Shipping & Returns page.