Bacteriostatic Water for Peptide Reconstitution

Bacteriostatic water is the preferred reconstitution vehicle for the majority of research peptide protocols. Its 0.9% benzyl alcohol preservative maintains sterility across multiple draws over a 28-day window — essential for peptide research requiring repeat dosing or multi-dose access from a single vial. Renew Lab Group manufactures HPLC-verified, USP-grade bacteriostatic water specifically suited to the demands of precision peptide research.

Why Peptide Researchers Choose Bacteriostatic Water

Lyophilized (freeze-dried) research peptides must be dissolved in a suitable carrier before use. The quality of that carrier directly affects your research outcomes in several ways: contamination risk, peptide stability over time, accuracy of concentration calculations, and consistency across multiple uses of the same preparation.

Bacteriostatic water addresses the multi-dose challenge that sterile water cannot: once a sterile water vial is opened, it must be used immediately. Bacteriostatic water’s benzyl alcohol preservative actively suppresses microbial growth after opening, keeping your preparation sterile for up to 28 days when refrigerated. For research protocols requiring repeated administration over days or weeks, this is essential.

Key Quality Parameters That Matter for Peptide Research

• Benzyl Alcohol Concentration (0.9%): The antimicrobial preservative. Too low and bacteriostasis is ineffective; too high and there may be peptide compatibility issues. Our HPLC-verified result: 0.91% (Batch BAC-26041201).
• pH (5.8): Most research peptides exhibit maximum stability at pH 5.5–6.5. Our pH of 5.8 sits in the sweet spot for most common research peptides including BPC-157, TB-500, CJC-1295, and GHRP series.
• Endotoxin (<0.1 EU/mL): Endotoxins can confound in vivo research results by triggering inflammatory responses independent of your peptide. Our endotoxin level is 5× below the USP limit.
• Sterility: Every batch passes USP <71> sterility testing — both aerobic and anaerobic. No growth detected.

Common Peptides Reconstituted with Bacteriostatic Water

Peptide	Typical Volume per mg	Concentration	Storage After Reconstitution
BPC-157	1–2 mL per mg	500–1000 mcg/mL	Refrigerate 2–8°C; use within 4–6 weeks
TB-500 (Thymosin Beta-4)	1–2 mL per mg	2–5 mg/mL	Refrigerate; avoid freeze-thaw
CJC-1295 (no DAC)	1–2 mL per mg	200–500 mcg/mL	Refrigerate; use within 4 weeks
GHRP-2 / GHRP-6	1 mL per mg	1 mg/mL	Refrigerate; stable 4–6 weeks
Ipamorelin	1–2 mL per mg	500 mcg/mL	Refrigerate; 4–6 weeks
Sermorelin	1–3 mL per 3mg	1 mg/mL	Refrigerate; use within 4 weeks
PT-141	1 mL per 10mg	10 mg/mL	Refrigerate; 3–4 weeks

Reconstitution Protocol Overview

For a complete step-by-step reconstitution protocol with volume calculations, storage guidance, and troubleshooting tips, see our full Bacteriostatic Water Reconstitution Guide. Summary steps:

1. Calculate the required volume of BAC water for your target concentration
2. Clean vial tops with alcohol swab
3. Draw the calculated BAC water volume into a sterile syringe
4. Insert needle into peptide vial and slowly release water against the glass wall — do not spray onto powder
5. Gently swirl to dissolve — do not shake vigorously
6. Label with reconstitution date, concentration, and 28-day discard date
7. Refrigerate at 2–8°C

Choose Your Vial Size

Vial Size	Best For	Starting Price
10ml Vials	Lower volume protocols, multiple compounds, fresher vials	$6.99 (1-pack)
30ml Vials	Higher volume protocols, single compound, maximum value per mL	$8.99 (1-pack)

Buy 10ml Vial — $6.99 Buy 30ml Vial — $8.99

All products are for laboratory and research purposes only. Not for human consumption.