Peptide Reconstitution Calculator

The amount of bacteriostatic water depends on your desired concentration per unit. Adding more water creates a lower concentration (requiring more units per dose), while adding less creates a higher concentration. Common volumes range from 1 mL to 3 mL depending on the peptide and vial size. Use the calculator above to determine the exact amount for your specific setup. Our complete reconstitution guide covers this in detail.

Peptide reconstitution is the process of dissolving lyophilized (freeze-dried) peptide powder with a sterile diluent, typically bacteriostatic water (BAC water containing 0.9% benzyl alcohol). This creates a solution at a known concentration, allowing for accurate measurement of specific amounts using a calibrated syringe.

Divide the total peptide amount in the vial (in mcg) by the total volume of bacteriostatic water added (in mL). For example: 5,000 mcg (5 mg) divided by 2 mL equals 2,500 mcg/mL. Since a standard U-100 insulin syringe has 100 units per mL, each unit would contain 25 mcg. This calculator performs these calculations automatically.

Insulin syringes are standard for peptide research. The most common are U-100 (1 mL / 100 unit) syringes. For smaller doses, 0.5 mL (50 unit) or 0.3 mL (30 unit) syringes offer finer graduation marks and greater precision. Choose the smallest syringe that accommodates your dose volume for maximum accuracy. Syringes with 29-31 gauge needles are typical for subcutaneous administration in research settings.

Most reconstituted peptides remain stable for approximately 30 days when stored at 2-8 degrees C and protected from light. Some peptides degrade faster - check individual stability data in our peptide database. Our storage and handling guide covers best practices in detail.

Peptide purity directly affects research accuracy. Impurities can include truncated sequences, deletion peptides, and oxidized forms. High-purity peptides (99%+) verified through independent HPLC and mass spectrometry ensure reliable results. See our COA interpretation guide and supplier evaluation methodology for detailed criteria.