Peptide Reconstitution Calculator
Calculate concentration, injection volume, and syringe units for your peptide.
Result
Enter values to calculate
Important Notice
This calculator is for educational and research purposes only. Always consult with a qualified healthcare professional before using any peptide. Dosages shown are general references and may not be appropriate for your specific situation.
Peptide Reconstitution Guide
Prepare the Environment
Proper preparation is essential to maintain sterility and ensure accurate reconstitution. A clean workspace helps prevent contamination and preserves peptide integrity.
- •Wash hands thoroughly and wear sterile gloves and safety goggles
- •Ensure your workspace is clean and free from contaminants
- •Have all materials ready: lyophilized peptide, sterile syringe, bacteriostatic water, alcohol wipes
Peptide & Solvent Preparation
Before reconstitution, both the lyophilized peptide powder and the bacteriostatic water should be allowed to reach room temperature. This thermal equilibration helps prevent condensation and ensures proper dissolution. Wipe the rubber stoppers of both vials with alcohol swabs to maintain aseptic conditions.
Adding the Solvent
The way you add the solvent can significantly affect peptide stability. Follow these steps carefully to preserve bioactivity:
- •Draw the required volume of bacteriostatic water into a sterile syringe
- •Tilt the peptide vial at a 45° angle
- •Slowly inject the water along the inner wall of the vial — avoid direct jetting onto the powder
- •Do not shake or vortex — gently swirl or rotate the vial until the powder is fully dissolved
- •Allow the solution to sit for a few minutes to ensure complete dissolution
Storage of Reconstituted Peptides
Proper storage is critical to maintain peptide stability and bioactivity over time. Follow these guidelines based on your storage timeline:
Lyophilized Powder
At -20°C: stable for 2+ years. At +4°C: 1–2 years. At room temperature: 3–6 months. Keep sealed and protected from light.
Reconstituted Solution
At +4°C: stable for 4–6 weeks. Do NOT freeze — freeze-thaw cycles damage peptide structure. Use promptly after reconstitution.
Our commitment is to offer researchers expert guidance and high-quality peptides for scientific research. These instructions are intended solely for informational and research purposes. Human consumption is strictly forbidden.
Frequently Asked Questions
How do I calculate peptide reconstitution?
To calculate peptide reconstitution, divide the total peptide amount (in mg) by the desired concentration (in mg/mL) to get the volume of bacteriostatic water needed. For example, 5 mg of peptide at 1 mg/mL concentration requires 5 mL of water.
What is bacteriostatic water?
Bacteriostatic water is sterile water containing 0.9% benzyl alcohol, which prevents bacterial growth. It is used to dissolve lyophilized peptide powders for injection. The benzyl alcohol allows multi-dose vials to be used safely over time.
How many units are in a 1 mL syringe?
A standard 1 mL insulin syringe contains 100 units. Each unit equals 0.01 mL. A 0.5 mL syringe has 50 units, and a 0.3 mL syringe has 30 units.
How long does reconstituted peptide last?
Reconstituted peptides stored at +4°C (refrigerator) are typically stable for 4-6 weeks. Do NOT freeze reconstituted peptides as freeze-thaw cycles can damage the peptide structure. Always use bacteriostatic water for multi-use vials.
Can I freeze reconstituted peptides?
It is generally NOT recommended to freeze reconstituted peptides. Freeze-thaw cycles can degrade peptide structure and reduce bioactivity. Store reconstituted solutions at +4°C and use within 4-6 weeks.