// Research Tools
Peptide Reconstitution Calculator
Enter your peptide vial size, target concentration, and desired dose — every graphic, table, and measurement updates live from the same numbers.
⚠ For in-vitro research calculation purposes only — not dosing advice
1
What Is Reconstitution?
The four-step process to prepare lyophilized peptides for research
Step 01
Let Warm
Allow sealed vial to reach room temperature (15–20 min) before opening to prevent condensation forming inside.
Step 02
Add Solvent
Inject bacteriostatic water slowly along the inner glass wall — never directly onto the powder cake.
Step 03
Roll Gently
Roll between palms for 30–60 seconds. Never shake or vortex — agitation can break peptide bonds.
Step 04
Inspect & Store
Solution must be clear and colourless. Refrigerate at 4°C. Use within 28 days of reconstitution.
Never shake the vial. Shaking introduces air bubbles and mechanical stress that denatures peptide bonds. Always roll slowly or let the solvent dissolve the powder passively with no agitation.
2
Reconstitution Calculator
All graphics and tables update from these inputs
Peptide Vial Amount5.0 mg
Bacteriostatic Water Added2.0 mL
Research Dose Target250 mcg
Syringe Type
Bacteriostatic water (BW) contains 0.9% benzyl alcohol which inhibits bacterial growth. It extends reconstituted peptide shelf life to ~28 days at 4°C versus ~5 days with sterile water.
2,500
mcg / mL — Concentration
micrograms of peptide per millilitre of solution
Vial Amount5.0 mg
Water Added2.0 mL
Concentration2,500 mcg/mL
Research Dose250 mcg
Draw Volume0.100 mL
Syringe Mark10.0 IU
Total Doses20 doses
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Visual — Vial Fill & Syringe Draw
Graphics update live from the calculator above
Reconstituted Vial
2.0 mL — 2,500 mcg/mL
Syringe — Draw Amount
Dose Summary
Concentration2,500 mcg/mL
Dose Target250 mcg
Draw Volume0.100 mL / 10.0 IU
Remaining Doses20 doses in vial
4
Concentration Reference Table
All values calculated from your peptide amount and dose — highlighted row matches your selection
The table shows what concentration, draw volume, and dose count you get for every common water volume. The highlighted row matches your calculator settings exactly.
| Water Added | Concentration | 250 mcg dose | Draw (mL) | Draw (IU) | Total Doses |
|---|
Less water = higher concentration = smaller draw volume. The slider supports up to 10 mL of reconstitution solvent. For very small doses, a higher concentration (less water) makes measurement more precise. For larger doses or multi-week studies, more water and lower concentration is often easier to work with.
5
How to Read a Syringe
IU markings, meniscus reading, and unit conversion
Read at eye level. Hold the syringe horizontally at eye height. Read from the bottom of the curved meniscus, not the top. Viewing from an angle adds parallax error.
IU ↔ Volume Conversion
On a 100 IU / 1 mL syringe, each IU equals exactly 0.01 mL. Use this table to confirm your draw amount:
| Syringe Mark (IU) | Volume (mL) | Volume (cc) |
|---|---|---|
| 5 IU | 0.050 mL | 0.050 cc |
| 10 IU | 0.100 mL | 0.100 cc |
| 20 IU | 0.200 mL | 0.200 cc |
| 25 IU | 0.250 mL | 0.250 cc |
| 50 IU | 0.500 mL | 0.500 cc |
| 75 IU | 0.750 mL | 0.750 cc |
| 100 IU | 1.000 mL | 1.000 cc |
50 IU syringe: Each IU = 0.01 mL still, but max volume is 0.5 mL. A 30 IU syringe maxes at 0.3 mL. Always check your syringe capacity label before drawing.
Formula: Draw Volume (mL) = Dose (mcg) ÷ Concentration (mcg/mL). Then multiply by your syringe IU capacity to get the syringe mark. Your calculator above does this automatically.
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Glossary
Key terms for peptide reconstitution
Lyophilized
Freeze-dried powder form of a peptide. Very stable for storage at -20°C. Must be reconstituted before use in research.
Bacteriostatic Water
Sterile water with 0.9% benzyl alcohol. Inhibits bacterial growth and extends reconstituted peptide viability to ~28 days at 4°C.
Concentration (mcg/mL)
Micrograms of peptide per millilitre of solution. Calculated as: (peptide mg × 1000) ÷ solvent mL.
Reconstitution
Dissolving lyophilized peptide powder in a liquid solvent to create a solution suitable for in-vitro research use.
IU (International Unit)
Measurement mark on IU syringes. On a 100 IU syringe, 100 IU = 1 mL, so 1 IU = 0.01 mL.
Meniscus
The concave curve of liquid in a syringe caused by surface tension. Always read volume from the bottom of the meniscus.
mcg (Microgram)
One thousandth of a milligram. Most peptide research quantities are measured in micrograms (mcg). 1 mg = 1,000 mcg.
CoA (Certificate of Analysis)
Lab document confirming purity, molecular weight, and sequence of a peptide lot. Included with every Peplix order.
Research Use Only Disclaimer: This calculator is provided for in-vitro laboratory research preparation purposes only. All values are mathematical calculations. Peplix does not provide dosing advice for human or veterinary use. All products are sold strictly for scientific research by qualified researchers.