Don't risk a $300 peptide on $10 bac water.
If your last vial went cloudy, the bac water is almost certainly why. Bac water made specifically for peptide reconstitution — sterile, non-pyrogenic, 0.9% benzyl alcohol, multi-dose 30ml vial. Not generic stock with a label on it.
Why generic bac water ruins peptides
Most bacteriostatic water on the market is generic stock — bottled once, distributed widely, repackaged for whoever needs it. That's fine if you're reconstituting saline. It's not fine if you're reconstituting a $300 peptide.
Sub-spec benzyl alcohol concentration fails to preserve the vial past the first week. pH drift outside the safe range breaks peptide bonds on contact. Counterfeit listings sometimes ship plain saline mislabeled as bacteriostatic. The peptide goes cloudy. The customer reaches the same conclusion every time: “Your peptide is bad.” In almost every case the peptide was fine. The bac water wasn't.
This bac water was made specifically for peptide reconstitution. Sterile, non-pyrogenic, 0.9% benzyl alcohol, prepared under controlled conditions for multi-dose peptide use — not adapted from generic stock or repurposed from another category. Built for one job.
So peptides don't get blamed for problems they didn't cause.
Prepared under controlled conditions, free of microbial contamination and endotoxins that destabilize peptides.
Full bacteriostatic preservative concentration. Suppresses bacterial growth across the 28-day multi-dose window.
Formulated for multi-dose peptide use, not adapted from generic stock or repurposed from another category.
Product details
| Volume | 30 mL multi-dose vial |
| Composition | Sterile, non-pyrogenic water with 0.9% benzyl alcohol |
| Function | Bacteriostatic agent — inhibits bacterial growth |
| Use case | Peptide and research-compound reconstitution + dilution |
| Multi-dose window | Maintains sterility for up to 28 days after first puncture (refrigerated, aseptic technique) |
| Storage before opening | Controlled room temperature |
| Production | Made specifically for peptide reconstitution, not adapted from generic bac water stock |
| Shipping | US-only, ships from in-house facility |
| Cost | $25 list — $21.25 with code thepeptidecatalog15 |
| Intended use | Laboratory research purposes only. Not for human, medical, or veterinary use. |
Common questions
What is bacteriostatic water for?+
A sterile, non-pyrogenic solution of water containing 0.9% benzyl alcohol that acts as a bacteriostatic agent to inhibit bacterial growth. Researchers commonly use it for the reconstitution and dilution of peptides and other research compounds. The benzyl alcohol preservative helps maintain sterility over multiple uses when stored and handled under aseptic conditions, making it suitable for controlled multi-dose laboratory applications.
How much do I need per peptide vial?+
Typical reconstitution uses 2-3 mL of bac water per peptide vial. A single 30 mL bottle covers 10-15 peptide vials, which is usually enough for a full 6-12 week protocol depending on dosing.
What's the difference between bacteriostatic water and sterile water?+
Sterile water has no preservative — once the seal is broken, you have hours of safe use, not days. Bacteriostatic water contains 0.9% benzyl alcohol, which acts as a bacteriostatic agent and supports multi-dose use under proper storage conditions. For multi-dose peptide and GLP-1 vials, bacteriostatic is the correct choice.
How should I store it?+
Store at controlled room temperature before opening. After first puncture, refrigerate and use within 28 days. Avoid contamination by using sterile technique during each draw — wipe the vial stopper with a 70% isopropyl swab and don't re-enter the vial with a needle that's been used elsewhere.
What's the intended use?+
This product is intended strictly for laboratory research purposes. It is not approved for human, medical, or veterinary use. Only trained professionals should handle it following standard laboratory safety protocols.
Why is this priced higher than generic bac water listings?+
Most bac water on the market is generic stock — bottled once, distributed widely, sold for whatever use case shows up. This product was made specifically for peptide reconstitution: sterile, non-pyrogenic, 0.9% benzyl alcohol formulated for multi-dose peptide use. The difference shows up when a $300 peptide vial doesn't reconstitute cloudy. The $5-10 price premium pays itself back the first time it prevents one bad vial.
Ready to reconstitute with confidence?
30ml multi-dose bacteriostatic water — $25, or $21.25 with code . Ships fast from in-house.
Buy 30ml Vial — $21.25