Introduction
If you’re working in a lab and using bacteriostatic water, chances are you’ve had questions about how it works, how long it lasts, and whether it’s the right choice for your protocols.
To save you time, we’ve compiled the most frequently asked questions (bacteriostatic water FAQs)— with clear answers for researchers.
(Note: All Herbilabs products are sold strictly for Research Use Only (RUO) — not for human or veterinary use.)
Bacteriostatic Water FAQ
What is bacteriostatic water made of?
It is 99.1% sterile water with 0.9% benzyl alcohol added as a preservative.
Why is benzyl alcohol included?
The 0.9% benzyl alcohol prevents bacterial growth after the vial is opened, allowing for multi-use access.
How long does bacteriostatic water last unopened?
Until the printed expiry date, if stored correctly at room temperature and in sealed condition.
How long does it last after opening?
Typically up to 28 days under sterile handling. Always follow your lab’s SOPs.
Does it need refrigeration?
Not required under normal lab conditions, but refrigeration is acceptable if above freezing. Never freeze.
Can bacteriostatic water replace sterile water?
Sometimes, but not always. Sterile water is single-use with no preservative; some experiments require no additives.
Is bacteriostatic water safe to inject?
No. Herbilabs products are RUO only and not intended for human or veterinary injection.
Why choose bacteriostatic water instead of sterile water?
Because it allows multiple sterile withdrawals, reduces waste, and extends usability.
Can bacteriostatic water expire early?
Yes, if exposed to light, extreme heat, contamination, or if packaging is damaged.
Does every supplier provide the same quality?
No. Always check for GMP manufacturing, batch COAs, and premium packaging (borosilicate vials with butyl stoppers).
Compliance Reminder
Herbilabs supplies bacteriostatic water strictly for Research Use Only (RUO). It must not be used in humans or animals.
Conclusion
Bacteriostatic water is simple in composition but versatile in research applications. By understanding its shelf life, proper use, and compliance limitations, labs can make the most of this essential solution. Feel free if these Bacteriostatic Water FAQs didnt have the answers you were looking for. Find our contact details at our contact page.
👉 Trusted by researchers across Europe:
