Storage guide
Practical guide to storing and reconstituting research peptides — temperatures, shelf life and the most common mistakes.
Lyophilised powder
Unopened vials are stable — colder means longer. Store in the original packaging, before reconstitution.
Only during shipping or short interim storage — not for the long haul.
The default place for powder you'll use within a few months.
Long-term storage — let the vial reach room temperature before opening or reconstituting.
Liquid — refrigerate and use quickly
Once the powder dissolves, the clock starts. Store the vial upright in the refrigerator.
Bacteriostatic vs. sterile water
The difference is one preservative — and it decides whether your vial lasts days or weeks.
Bacteriostatic water
Contains a mild preservative that suppresses bacterial growth. Standard for multi-dose vials — peptide stays stable for ~28 days at 2 – 8 °C on average.
Sterile water (no preservative)
Suitable for single-use protocols or analytical runs. Without a preservative the reconstituted solution must be used within 24 hours — contamination risk afterwards.
Keep in the dark — peptides are light-sensitive
UV and bright daylight can oxidise amino-acid residues. Amber vials help, but the simplest rule: always keep peptides in a dark box or drawer — before and after reconstitution.
Common mistakes
Shaking instead of swirling
Peptides are fragile protein chains. Vigorous shaking can unfold their structure. Trickle the water along the vial wall and swirl gently until dissolved.
Repeated freeze-thaw cycles
Every freeze-thaw cycle introduces micro-damage. Only freeze reconstituted peptide if you aliquot it per dose — never the whole vial.
Leaving it in BAC too long
Even with a preservative, a vial loses activity after ~28 days at 2 – 8 °C. Plan dosing so a vial gets used up within the window.
Storing on the kitchen counter
Room temperature, warmth and light accelerate degradation. Refrigerate immediately after delivery — freezer if you won't use it for a few months.
Shelf-life calculator
Enter the date you reconstituted. We'll show you how long you can safely dose.
The day you added BAC or sterile water to the powder.
Result
For laboratory research only. Not for human or veterinary use. Shelf-life figures are general guidelines — consult the Certificate of Analysis per peptide for specific stability data.