Research tool
Peptide Reconstitution Calculator
Enter the peptide mass in your vial and the volume of bacteriostatic water you plan to add. The calculator returns the working concentration and the amount contained in each unit of a U-100 lab syringe, so reconstitution records stay exact. For laboratory research use only.
1 · Reconstitution
Concentration
— mg/mL
— mcg/mL
Per syringe unit
— mcg
1 unit = 0.01 mL (U-100)
2 · Draw a target amount
Draw volume
— mL
— units on a U-100 syringe
How to reconstitute a lyophilized peptide
Lyophilized peptides arrive as a dry powder. To bring one into solution, add bacteriostatic water slowly down the inside wall of the vial — never inject the stream directly onto the powder — then let it dissolve without shaking. The volume of diluent you add sets the working concentration: more water means a lower concentration per unit drawn, less water means a higher one.
Why bacteriostatic water
Bacteriostatic water contains 0.9% benzyl alcohol, a preservative that suppresses microbial growth across repeated stopper entries, which makes it the standard diluent for multi-dose research vials. Store reconstituted, preserved vials at 2-8 °C protected from light and use within the window your protocol specifies.