Laboratory protocol for reconstituting lyophilized peptides with appropriate diluents for research applications.
Diluent Selection
- Bacteriostatic Water (BAC water): Sterile water with 0.9% benzyl alcohol preservative. Preferred for multi-dose reconstitution as benzyl alcohol inhibits microbial growth.
- Sterile Water: Preservative-free. Suitable for single-use applications but offers no antimicrobial protection after opening.
- Normal Saline (0.9% NaCl): Used for certain peptides that require isotonic diluent.
General Protocol
- Allow the lyophilized vial and diluent to reach room temperature
- Clean the vial stopper with an alcohol swab
- Using a sterile syringe, slowly inject the diluent along the inside wall of the vial
- Do not shake. Allow the peptide to dissolve by gentle swirling
- Once fully dissolved (solution should be clear), store at 2-8°C
Calculating Concentration
Concentration = Amount of peptide (mg) ÷ Volume of diluent (mL)
Example: 5 mg peptide + 2 mL BAC water = 2.5 mg/mL (2,500 mcg/mL)
Research Disclaimer
This article is compiled from peer-reviewed research and publicly available scientific literature. It is intended for educational and informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before making health-related decisions.