Written by the AllMyPeptides Research Team
What You Will Need
Before reconstituting your peptide, gather the following supplies:
- Lyophilised peptide vial
- Bacteriostatic water (not sterile water)
- U-100 insulin syringe (1ml recommended)
- Alcohol prep pads
- Sharps disposal container
Work in a clean environment. A laminar flow hood is ideal, but a clean bench wiped with alcohol is sufficient for most research applications.
Reconstitution Steps
Follow these steps carefully:
- Clean the stoppers: Wipe both the bacteriostatic water vial and peptide vial stoppers with an alcohol prep pad.
- Draw the water: Pull back the syringe plunger to draw air equal to the amount of water you will add. Insert the needle into the bacteriostatic water vial and inject the air. Turn the vial upside down and withdraw the desired volume.
- Inject slowly: Insert the needle into the peptide vial at an angle. Inject the water slowly down the inside wall of the vial. Never spray water directly onto the powder — this can damage the peptide structure.
- Dissolve gently: Allow the water to run down the sides and wet the powder. Swirl gently — do not shake or vortex vigorously.
- Wait: Some peptides dissolve instantly; others may take a few minutes. Do not force dissolution.
After Reconstitution
Once fully dissolved:
- Label the vial with the peptide name, concentration, and reconstitution date
- Store at 2-8°C (refrigerator)
- Use within 30 days
- Do not freeze
- Keep away from direct light
Most peptides will produce a clear solution. If the solution remains cloudy or contains visible particles after 10 minutes of gentle swirling, do not use it — contact your supplier.
Frequently Asked Questions
How much bacteriostatic water should I add?+
This depends on your desired concentration. Common volumes are 1-2ml for a 5mg vial and 2-3ml for a 10mg vial. Use our peptide calculator to determine precise volumes for your research protocol.
Can I use sterile water instead of bacteriostatic water?+
Bacteriostatic water is strongly recommended because it contains 0.9% benzyl alcohol which prevents bacterial growth. Sterile water lacks a preservative and is not suitable for multi-dose research applications.
How do I know if my peptide is fully dissolved?+
The solution should be clear with no visible particles. Some peptides may have a slight haze initially but should clear within a few minutes of gentle swirling.
Can I reconstitute multiple peptides in the same vial?+
This is generally not recommended unless your specific research protocol calls for it. Each peptide should be reconstituted separately to maintain accurate concentrations.
Related Guides
Products discussed in this guide are for research and laboratory use only. AllMyPeptides does not condone or support misuse of any research materials. Not for human or animal consumption.