Storing Lyophilized Research Peptides: Temperature, Light and Moisture

Why storage matters

Peptides degrade through moisture, heat, light and repeated temperature swings. Poor storage can lower effective purity before an experiment even begins, making results harder to reproduce.

Before reconstitution

Lyophilized (freeze-dried) powder is the most stable form. General laboratory practice:

• Short term: keep sealed vials cool, dry and away from light; refrigeration (2–8 °C) is common.
• Long term: store frozen (around −20 °C or colder) in the sealed vial.
• Let a cold vial reach room temperature before opening, so condensation doesn't introduce moisture.
• Keep vials in their packaging or a dark container to limit light exposure.

After reconstitution

Once dissolved, peptides are far less stable. Labs typically refrigerate reconstituted solutions, use them within a limited window set by their protocol, and avoid repeated freeze–thaw cycles by splitting solutions into single-use aliquots.

Handling tips

Label every vial with the batch number and the date it was opened or reconstituted, use sterile technique and clean supplies, and record storage conditions with your experimental notes.

Important

This guide covers general laboratory handling only. DenaLab products are sold for laboratory research use only and are not for human or veterinary use. Always follow your institution's protocols and the specific product documentation.