What determines it
Residual moisture from the drying process, the sequence itself — how many labile residues it contains — storage temperature, and protection from light and oxygen. Two peptides dried and stored identically can have quite different shelf lives if one contains Asn-Gly and the other does not.
How it is established
By stability testing: samples held under defined conditions and analysed at intervals to measure how purity changes. Accelerated studies at elevated temperature give an early estimate, confirmed by real-time data.
The date is set where the material is expected to remain within specification, with margin.
The assumption behind the date
Every expiry date assumes the stated storage conditions were maintained. A vial stored warm has aged faster than the calendar suggests, and the printed date does not know that. This is why handling records matter more than the date itself.
Research use only. This page is explanatory and does not recommend any use, quantity or procedure. REVIVE LAB supplies reference materials for laboratory research. These are not medicines and are not for human or veterinary consumption. Anyone considering the use of any compound in humans should do so only under qualified medical supervision.