Bactericidal water
Showing 1–12 of 16 results
Showing 1–12 of 16 results
Bacteriostatic water is what makes a peptide vial usable
Peptides arrive as a freeze-dried powder and have to be reconstituted before use. What you reconstitute with determines how long the vial stays usable. This section holds 8 lines from £12 to £55, averaging near £26.
The three fluids, and when each is right
| Fluid | Contains | Use |
|---|---|---|
| Bacteriostatic water | 0.9% benzyl alcohol | Multi-dose vials used over weeks |
| Sterile water | Nothing | Single use — no preservative |
| Sodium chloride 0.9% | Saline, no preservative | Single use |
The benzyl alcohol is the entire point. It inhibits bacterial growth, which is what allows a reconstituted vial to be entered repeatedly across several weeks. Sterile water has no preservative, so once the stopper is pierced there is nothing preventing contamination — which makes it the wrong choice for anything dosed more than once.
Getting it wrong is a real risk, not a technicality
A vial reconstituted with sterile water, kept a fortnight and injected from repeatedly is a real infection risk — among the commonest mistakes made by people new to the peptides range, because the fluids look identical.
Practical points
Add the fluid slowly down the side of the vial, and swirl rather than shake — peptides are fragile proteins. Refrigerate afterwards and use within a few weeks. The volume added only changes concentration, not the amount of peptide present.
A note on the labels here
Products in this section are variously labelled bacteriostatic water, sterile water and sodium chloride, and the category names on this site do not reliably distinguish them. Read the individual product rather than relying on the section name, and check for the benzyl alcohol if a multi-dose vial is what you need for the growth hormone range.
Storage before you open it
Unopened vials are stable at room temperature until their expiry date. Only reconstituted peptide needs refrigerating.
Anyone working through the peptides or growth hormone ranges will use more of this than they expect, and it is inexpensive enough to keep spare rather than run short mid-vial.
Frequently asked questions
What is the difference from sterile water?
Bacteriostatic water contains benzyl alcohol, which inhibits bacterial growth and allows repeated entry over weeks.
Can I use sterile water instead?
Only for a single dose. Without a preservative, a repeatedly entered vial is an infection risk.
How much should I add?
Whatever you choose — it changes concentration, not the amount of peptide. Larger volumes are easier to measure.
Shake or swirl?
Swirl. Peptides are fragile proteins and vigorous shaking can damage them.
How long does a reconstituted vial last?
Refrigerated and reconstituted with bacteriostatic water, typically a few weeks.
