How to Reconstitute Peptides: Step-by-Step Guide
Learn how to safely reconstitute lyophilized peptides with bacteriostatic water. Covers equipment, sterile technique, storage, and common mistakes.
What Reconstitution Means
Reconstitution is the process of dissolving a lyophilized peptide powder with a sterile liquid so the final concentration is measurable and repeatable.
Supplies Checklist
- Lyophilized vial to be reconstituted
- Bacteriostatic water for multi-use workflows
- Alcohol swabs for stopper sanitation
- Syringe appropriate for draw precision
- Sharps container for safe disposal
Step-by-Step Process
1. Prepare a clean workspace
Wash hands, wipe your workspace, and set all materials in one area to reduce handling errors.
2. Clean vial stoppers
Use alcohol swabs on both the peptide vial and diluent vial stoppers before needle entry.
3. Draw the diluent
Draw your selected volume of bacteriostatic water. This chosen volume controls final concentration.
4. Add liquid gently
Inject against the inside wall of the vial rather than directly onto the powder.
Gentle handling helps reduce foaming and protects solution quality.
5. Dissolve without shaking
Swirl slowly. Avoid aggressive shaking.
6. Label and refrigerate
Mark reconstitution date and concentration, then store according to your protocol.
Example Concentration Outcomes
| Peptide Amount | Water Added | Final Concentration |
|---|---|---|
| 5 mg | 1 mL | 5 mg/mL |
| 5 mg | 2 mL | 2.5 mg/mL |
| 10 mg | 2 mL | 5 mg/mL |
| 10 mg | 3 mL | 3.33 mg/mL |
Common Mistakes to Avoid
- Skipping stopper sanitation
- Using inconsistent water volumes between refills
- Forgetting to label date and concentration
- Reusing needles
Use the dosage calculator to convert concentration into a draw amount for your syringe type.
Calculate Your Dose →