Ipamorelin Reconstitution Calculator

Each cell = concentration for that vial mass and diluent volume, with mcg per U-100 unit and nmol/mL (from MW 711.9). Concentration = vial mg ÷ water mL.

Good aqueous solubility for a small peptide; the lysine residue and C-terminal amide keep it hydrophilic, so plain sterile or bacteriostatic water suffices with no co-solvent and no acidified diluent.

At 711.9 g/mol Ipamorelin is the smallest peptide in this calculator set — roughly one-seventh the mass of tesamorelin — which is why it hydrates fastest and why its molar figures run an order of magnitude higher at the same mass concentration. A 5.00 mg/mL Ipamorelin solution is about 7,023 nmol/mL; 5.00 mg/mL of tesamorelin is about 974 nmol/mL. When comparing two different peptides, molar concentration is the comparable number, not mg/mL.

Technique. Run the diluent down the inside wall of the vial rather than jetting it onto the cake. Swirl or roll until dissolved; do not shake or vortex — foaming drives peptide to the air-liquid interface and mechanically stresses the chain. A clear, colorless solution inside about a minute is normal. Ipamorelin does not typically gel, cloud, or leave lasting particles the way larger or less soluble peptides can.

Choosing a volume. The peptide dissolves cleanly across the whole 1-5 mL range, so diluent volume is a measurement-convenience decision rather than a solubility constraint. More water lowers the mcg carried by each U-100 unit, which gives finer resolution per graduation on the syringe barrel.

Storage. Lyophilized at -20 C, sealed and desiccated, out of light. Reconstituted at 2-8 C, protected from light, typical working window about four weeks. Discard any solution that turns cloudy or discolored or carries visible floating particles.

A 10 mg vial reconstituted with 2 mL of bacteriostatic water, worked through step by step:

• Concentration: 10 mg ÷ 2 mL = 5.00 mg/mL
• Per U-100 unit (1 unit = 0.01 mL): 5.00 mg/mL × 0.01 mL = 0.05 mg = 50 mcg per unit
• Molarity: (5.00 ÷ 711.9) × 1,000,000 = 7,023 nmol/mL
• A 0.10 mL draw (10 units on a U-100 barrel) carries 0.5 mg = 500 mcg
• Total yield: 2.00 mL of solution = 200 U-100 units in the vial

Halving the water to 1 mL doubles every concentration figure and halves the total unit count; the milligrams in the vial never change.

Does Ipamorelin need an acidified diluent?
No. It is a small, freely water-soluble pentapeptide, so plain bacteriostatic or sterile water dissolves it without acetic acid or any other co-solvent. Acidified diluents are reserved for peptides that will not hydrate in neutral water.

How is the nmol/mL figure derived?
Divide the concentration in mg/mL by the molecular weight in g/mol, then multiply by 1,000,000. For Ipamorelin at 5.00 mg/mL: (5.00 / 711.9) x 1,000,000 = 7,023 nmol/mL. The molecular weight used here is 711.9 g/mol.

Does adding more water make the vial weaker?
It lowers the concentration, not the total mass. A 10 mg vial holds 10 mg whether it is mixed into 1 mL or 5 mL; the water only decides how many milligrams occupy each millilitre, and therefore how many mcg sit in each U-100 unit.

Why does Ipamorelin show much higher nmol/mL than the larger peptides?
Because molarity is mass divided by molecular weight. At 711.9 g/mol Ipamorelin is a fraction of the mass of a 40-residue peptide, so the same milligram figure represents far more molecules.

What is the difference between bacteriostatic and sterile water here?
Bacteriostatic water contains 0.9% benzyl alcohol as a preservative, which is what allows a vial to be entered more than once across a refrigerated storage window. Plain sterile water has no preservative and is a single-entry diluent. Neither changes the concentration arithmetic.