Peptide reconstitution chart
Generate concentration and syringe-unit tables across common bacteriostatic water volumes. For a single dilution, use the reconstitution calculator or dosage calculator.
| BAC water added | Concentration (mcg/mL) | Units for 250 mcg |
|---|---|---|
| 1 mL | 5,000 mcg/mL | 5 units0.05 mL |
| 1.5 mL | 3,333 mcg/mL | 7.5 units0.075 mL |
| 2 mL | 2,500 mcg/mL | 10 units0.1 mL |
| 2.5 mL | 2,000 mcg/mL | 12.5 units0.125 mL |
| 3 mL | 1,667 mcg/mL | 15 units0.15 mL |
| 5 mL | 1,000 mcg/mL | 25 units0.25 mL |
concentration mcg/mL = (vial mg × 1000) ÷ BAC water mL · U-100 units = (dose mcg ÷ concentration) × 100
What this chart is (and how to use it)
Many research peptides arrive as lyophilized powder. Reconstitution is the step where liquid is added so the powder becomes a solution that can be drawn into a syringe. This page does not tell you which liquid or volume is right for a specific product — that always comes from the label, COA, or the researcher's own protocol — but it shows the arithmetic once a diluent volume has been chosen.
Bacteriostatic water (“BAC water”) is sterile water with a small amount of benzyl alcohol as a preservative. It is commonly chosen for multi-draw research vials because the preservative slows bacterial growth compared with plain sterile water. It is not sterile forever — storage time, handling, and product instructions still apply. See BAC vs sterile water for the property comparison.
How to read the table: enter vial strength in mg (printed on the vial or certificate) and a target dose in mcg. Each row is a different total volume of BAC water added to that vial. Concentration is mcg per mL. Units are marks on a 100-unit (1 mL) insulin syringe for that target dose — geometric volume on the barrel, not insulin drug units. Scanning the rows compares “more water = lower concentration = more units to draw” versus “less water = higher concentration = fewer units,” so a dilution that is practical to measure can be recorded.
The same formulas power inventory reconstitution and Log Dose on the app. Full derivation: log dose calculations.
Related reconstitution tools
Calculators and tables that sit next to this one — mix math, syringe units, diluent notes, and storage windows.
Educational and organizational tool only — not medical advice, dosing guidance, or a substitute for professional judgment. For research purposes only.