What Is Bacteriostatic Water?
Bacteriostatic Water is a sterile mixing solution sold by Peptide Hubs. It is Sterile Water 0.9% with a small amount of benzyl alcohol added to stop bacteria from growing. Each vial holds 10 ml.
If you work with peptides, you need this to bring them back into liquid form. Most peptides ship as a dry powder, and that powder has to be mixed with water before any lab work can start. Plain water works once, but a mixed vial can only sit for a day or two. The benzyl alcohol in bacteriostatic water keeps the solution usable for weeks, so one vial of peptide is not wasted after the first use.
Why Buy Bacteriostatic Water From Peptide Hubs
- Sterile and sealed - supplied in a 10 ml vial ready for lab use.
- Slows bacterial growth - the benzyl alcohol keeps a mixed peptide stable for longer.
- Enough for many vials - 10 ml covers a lot of reconstitution work.
- Matched to our range - works with every lyophilized peptide we stock.
Product Details
- Manufacturer: Peptide Hubs
- Pharmaceutical name: Sterile Water 0.9%
- Pack: 10 ml vial
- Use: mixing lyophilized peptide powder before lab work
How To Store Bacteriostatic Water
Keep the unopened vial in a cool, dark and dry place. Once you start using it, store it in a fridge between 2 and 8 degrees Celsius. Always wipe the rubber top with alcohol before you draw from it, use a fresh needle every time, and never touch the stopper with bare hands. Discard the vial if the liquid turns cloudy or shows particles.
Which Peptides Need It
Every freeze dried peptide in our shop is mixed with bacteriostatic water before use. Common examples are BPC 157 by Peptide Hubs, GHK-Cu 50mg by Peptide Hubs and MOTS-c 10mg by Peptide Hubs. If you want the repair pair in one box, the TB 500 and BPC 157 Peptide Stack by Peptide Hubs saves you buying both separately. You can see the full list on our SARMS and Peptides page.
Common Questions About Bacteriostatic Water
How is it different from plain sterile water?
Both are sterile. Bacteriostatic water also contains benzyl alcohol, which slows bacterial growth so a mixed peptide stays usable for weeks instead of days.
Do I need a prescription?
No. You can buy Bacteriostatic Water without prescription from our shop.
How much do I need per vial?
It depends on the concentration you want and the size of the peptide vial. A 10 ml bottle covers many small vials.
Buy Bacteriostatic Water Online
Add Bacteriostatic Water to your cart and check out. It is worth ordering it together with your peptides, so you are ready to mix as soon as your parcel lands. Browse the SARMS and Peptides category to build the full order in one go.
Reconstitution & Storage
Mixing a peptide takes about a minute. What people usually get wrong is what happens afterwards. Work through the steps in the guide above, then store the vial the way we lay out further down.

How to Reconstitute
The five steps above cover it. Let the vial and the bacteriostatic water sit out until they reach room temperature. Then run the bacteriostatic water down the inside wall of the vial, slowly, so it does not foam up. Swirl it gently until the powder is gone. Do not shake the vial, and do not squirt the bacteriostatic water straight onto the powder.
How to Store the Mixed Peptide
As soon as it is mixed, put the vial back in the fridge. 2 to 8°C (35.6°F to 46.4°F) is what you want, and it stays there until you have used it up. Write the mixing date on the label. Do not rely on memory for that.
- Temperature: an ordinary fridge, 2 to 8°C (35.6°F to 46.4°F). Not the freezer, not a kitchen cupboard.
- How long it lasts: around 4 weeks. Anything past 28 days goes in the bin.
- Light: keep it in the box or in a dark drawer. Light breaks peptides down.
- Handling: wipe the stopper with an alcohol swab before each draw, use a new needle and do not shake it. Swirl if it needs a mix.
- Freezing: never freeze a mixed solution. Ice crystals form, and a freeze and thaw cycle costs you potency.
- Throw it out if: the liquid goes cloudy, changes colour, or you can see particles in it.
The dry powder is much easier to keep. Store it dry and away from light, at room temperature if it is only for a short while, or at -20°C for the long term. Only mix what you are going to use.