Research
Research guides
Practical reference notes for working with research peptides in the lab.
Reading a certificate of analysis
Check that the lot number matches your label, that identity is confirmed by mass spectrometry, and that HPLC purity meets your protocol. Our quality page explains each test in more detail.
Storing lyophilized peptides
Keep vials sealed, dry and away from light, ideally at or below -20 °C for long-term storage. Let a vial warm to room temperature before opening so moisture does not condense on the powder, and avoid repeated freeze-thaw cycles.
Understanding net peptide content
The weight on a vial is the total lyophilized mass. It includes counter-ions and some residual water as well as the peptide itself, which is why net peptide content is reported separately on many certificates.
Vials, liquids, capsules and topicals
Choose the format your protocol calls for. Lyophilized vials offer the longest shelf life, aqueous liquids come ready-formulated, capsules hold solid-form compounds, and topical systems are built for formulation research.
Glossary
HPLC: high-performance liquid chromatography, used to measure purity. MS: mass spectrometry, used to confirm identity. Lyophilized: freeze-dried. Lot: a single production batch with its own certificate. RUO: research use only.