Peptide Reconstitution: A Researcher's Guide
Related Product
BAC Water
Why Reconstitution Matters
Lyophilised peptides are supplied in powder form to maximise stability during storage and shipping. Before use in research protocols, they must be reconstituted into solution. The quality of reconstitution directly affects peptide integrity, concentration accuracy, and research reproducibility.
Choosing a Reconstitution Vehicle
The most commonly used reconstitution vehicle for research peptides is bacteriostatic water (BAC water) — sterile water containing 0.9% benzyl alcohol as a preservative. The benzyl alcohol inhibits microbial growth, extending the usable life of the reconstituted solution compared to plain sterile water.
For peptides that are poorly soluble in water, researchers sometimes use dilute acetic acid (0.1–1%) or DMSO as a co-solvent, followed by dilution with BAC water. Always consult the specific peptide's solubility data before choosing a vehicle.
Reconstitution Protocol
- Allow the lyophilised vial to reach room temperature before opening to prevent moisture condensation.
- Calculate the volume of BAC water needed for your target concentration.
- Using a sterile syringe, inject BAC water slowly down the side of the vial — do not inject directly onto the powder.
- Gently swirl (do not vortex or shake vigorously) until the powder is fully dissolved.
- Allow to stand for 5–10 minutes if needed for complete dissolution.
- Label the vial with the date, concentration, and peptide name.
Storage of Reconstituted Peptides
Reconstituted peptides should generally be stored at 2–8°C (refrigerator temperature) for short-term use (up to 4 weeks with BAC water) or at −20°C for longer storage. Avoid repeated freeze-thaw cycles, which can degrade peptide structure.
Always follow your institution's protocols for handling and disposal of research compounds.
Research Disclaimer: This article is provided for informational and educational purposes only. It does not constitute medical advice, diagnosis, or treatment. All products are intended strictly for laboratory research and are not approved for human consumption.