Stability & storage

Most peptide degradation is hydrolysis, oxidation or aggregation, and all three are accelerated by water and heat. Store lyophilised powder dry and cold, typically 2–8 °C for routine grades and −20 °C for research material, and let vials equilibrate to room temperature before opening to avoid condensation.

In solution, stability depends on pH, buffer and concentration. Peptides containing methionine or cysteine are prone to oxidation; those with asparagine can deamidate at neutral to alkaline pH. If your formulation requires a long shelf life, ask for stability data in the intended matrix rather than extrapolating from powder data.