Peptide storage, stability and solubility: reference data

Last reviewed: 10 October 2026 · Sable Peptides research team

Lyophilised peptides are most stable sealed, dry and frozen at −20 °C or colder, protected from light. Peptides in solution are much less stable than the dry solid, and repeated freezing and thawing degrades them.

Stability by form

FormReference storage conditionStability notesSource
lyophilised, long term−20 °C or colder, desiccated, darkmost stable formGenScript, Biosynth
lyophilised, short term2–8 °C, sealed with desiccantmoisture uptake reduces stabilityBiosynth
in solutionnot a storage form for the catalogue productmuch less stable than lyophilised; repeated freeze–thaw degrades peptides; Cys, Met, Trp, Asn and Gln residues are the most labileBiosynth, GenScript

Solubility by peptide character (reference)

Peptide characterTypical solubility behaviourChemical notes from sourcesSource
basic (net positive charge)generally water-soluble; solubility rises at acidic pH–Bachem, Merck
acidic (net negative charge)solubility rises at neutral to basic pHammonium hydroxide is incompatible with Cys-containing peptidesMerck
neutral or hydrophobiclow water solubility; often soluble in organic solvents such as DMSO, DMF or acetonitrileDMSO can oxidise Cys and Met residuesBiosynth, Merck

Reference data only. This page gives no preparation method.

Sources

Research use only. Not for human consumption. No health claims.