How Much Bacteriostatic Water Do You Mix With Peptides?
⚡ Direct Answer
Most research peptides (5mg or 10mg vials) are reconstituted with 1.0 mL to 3.0 mL of bacteriostatic water. For example, adding 2.0 mL of water to a 5mg vial yields a concentration of 2.5 mg/mL (2,500 mcg/mL); drawing a 250 mcg dose requires 10 units (0.10 mL) on a U-100 syringe. The diluent volume determines solution concentration without altering total peptide content.
Universal Peptide Reconstitution Reference Table
Vial Size:2 mg
Bac Water Added:1.0 mL
Concentration:2.0 mg/mL (2,000 mcg/mL)
Example Dose:100 mcg
U-100 Syringe Draw:5 Units (0.05 mL)
Vial Size:5 mg
Bac Water Added:2.0 mL
Concentration:2.5 mg/mL (2,500 mcg/mL)
Example Dose:250 mcg
U-100 Syringe Draw:10 Units (0.10 mL)
Vial Size:10 mg
Bac Water Added:2.0 mL
Concentration:5.0 mg/mL (5,000 mcg/mL)
Example Dose:500 mcg
U-100 Syringe Draw:10 Units (0.10 mL)
Vial Size:20 mg
Bac Water Added:2.0 mL
Concentration:10.0 mg/mL (10,000 mcg/mL)
Example Dose:1,000 mcg
U-100 Syringe Draw:10 Units (0.10 mL)
Vial Size:50 mg
Bac Water Added:5.0 mL
Concentration:10.0 mg/mL (10,000 mcg/mL)
Example Dose:2,000 mcg
U-100 Syringe Draw:20 Units (0.20 mL)
| Vial Size | Bac Water Added | Concentration | Example Dose | U-100 Syringe Draw |
|---|---|---|---|---|
| 2 mg | 1.0 mL | 2.0 mg/mL (2,000 mcg/mL) | 100 mcg | 5 Units (0.05 mL) |
| 5 mg | 2.0 mL | 2.5 mg/mL (2,500 mcg/mL) | 250 mcg | 10 Units (0.10 mL) |
| 10 mg | 2.0 mL | 5.0 mg/mL (5,000 mcg/mL) | 500 mcg | 10 Units (0.10 mL) |
| 20 mg | 2.0 mL | 10.0 mg/mL (10,000 mcg/mL) | 1,000 mcg | 10 Units (0.10 mL) |
| 50 mg | 5.0 mL | 10.0 mg/mL (10,000 mcg/mL) | 2,000 mcg | 20 Units (0.20 mL) |
Matching diluent volume to vial capacity makes drawing precise micro-doses easy on insulin syringes. For interactive calculations across any custom peptide vial, try the universal peptide calculator.
Disclaimer: This tool and information are intended strictly for educational and laboratory research reference. Peptides described are not approved for human clinical use or self-administration without prescription. Always consult a qualified medical professional for health inquiries.