How to reconstitute lyophilised research peptides with bacteriostatic water — volume calculations, sterile technique and safe storage after mixing.
Reconstitution is the process of dissolving lyophilised (freeze-dried) peptides back into solution using a suitable solvent, typically bacteriostatic water. This step is essential before peptides can be used in research applications.
Lyophilised peptide vial, bacteriostatic water (0.9% benzyl alcohol), sterile syringe with needle, alcohol swabs for sanitisation, and a clean work surface. All supplies should be sterile to prevent contamination.
The volume of bacteriostatic water to add depends on your desired concentration. A common starting concentration is 1mg/ml. For example, for a 10mg peptide vial, you would add 10ml of bacteriostatic water to achieve 1mg/ml. For a 5mg vial, add 5ml for the same concentration. Adjust volumes according to your specific research protocol requirements.
Follow these steps carefully to ensure proper reconstitution without degrading the peptide.
Store reconstituted peptides at 2-8°C (standard refrigerator temperature). Use within 4-6 weeks for optimal stability. Avoid repeated freeze-thaw cycles. Label the vial with the date of reconstitution and concentration.
Injecting water directly onto the peptide powder (always aim down the side of the vial). Shaking or vortexing the vial vigorously. Using non-sterile water or equipment. Leaving reconstituted peptides at room temperature. Not recording the reconstitution date and concentration.
Ensure your work surface is clean. Wipe down vial stoppers and syringe port with alcohol swabs.
Using a sterile syringe, draw the calculated volume of bacteriostatic water.
Insert the needle through the vial stopper. Slowly inject the water down the inside wall of the vial. Do not spray directly onto the peptide powder.
Let the vial sit for 1-2 minutes. The peptide should dissolve on its own. You may gently swirl the vial if needed — never shake.
The reconstituted solution should be clear and free of visible particles. If cloudiness persists, allow more time for dissolution.
Label the vial with the peptide name, concentration, and date of reconstitution. Store at 2-8°C.
Research-grade compounds referenced in this guide, supplied with full Certificates of Analysis.
All products sold by Neovia Peptides are strictly for in-vitro research and laboratory use only. Not intended for human or veterinary use, food additives, drugs, or cosmetics. By purchasing from this website, you agree that you understand and accept these terms.
