In short: Lyophilised (freeze-dried) research peptides are best kept cold and dark and are stable for extended periods; once reconstituted with bacteriostatic water they should be refrigerated and used within a shorter window. Minimise temperature cycling and light exposure.

Storing lyophilised peptides

In powder form, research peptides are relatively stable. Laboratories generally keep lyophilised vials cold and away from light and moisture, limiting repeated warming and cooling that can degrade sensitive sequences.

Storing reconstituted peptides

After reconstitution with bacteriostatic water, a peptide is in solution and less stable than the dry powder. Refrigeration and minimal handling help preserve integrity for the shorter working window.

Common handling mistakes

Vigorous shaking, direct light, and freeze-thaw cycling are the most common causes of avoidable degradation in a research setting. Gentle reconstitution and stable cold storage protect your data. Explore compound-specific handling notes across the Research Series.

Frequently Asked Questions

Do lyophilised peptides need refrigeration?

Lyophilised peptides are commonly stored cold for longevity; short periods at ambient temperature during shipping are generally tolerated. Follow the batch documentation.

How long do reconstituted peptides last?

In solution, stability is shorter than the dry powder and depends on the specific peptide and storage temperature. Researchers keep reconstituted vials refrigerated and minimise handling.

What water is used to reconstitute peptides?

Bacteriostatic water is the standard reconstitution fluid in peptide research because the preservative limits microbial growth over multiple withdrawals.

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