Introduction
Bacteriostatic Water Shelf life is one of the most common questions labs ask. Because it contains 0.9% benzyl alcohol, it lasts longer than sterile water once opened — but proper storage is still essential.
This article explains how long bacteriostatic water shelf life, what can shorten its stability, and best practices for lab storage.
(Note: All Herbilabs products are sold strictly for Research Use Only (RUO) — not for human or veterinary use.)
Shelf Life When Unopened
- Unopened bacteriostatic water remains stable until the printed expiry date on the vial.
- Properly stored at room temperature (15–30°C), it maintains sterility and composition.
- Always check packaging integrity before use — cracked vials or damaged seals should not be used.
Bacteriostatic water Shelf Life After Opening
- Thanks to benzyl alcohol, bacteriostatic water can be accessed multiple times.
- Under aseptic handling, most labs use it for up to 28 days after opening.
- Discard sooner if:
- The solution becomes cloudy
- Contamination is suspected
- Lab SOPs specify a shorter timeframe
- The solution becomes cloudy
Factors That Affect Stability
- Storage Conditions – Direct sunlight, extreme heat, or freezing reduce shelf life.
- Handling Technique – Using non-sterile syringes or touching the stopper contaminates the vial.
- Frequency of Use – More frequent withdrawals increase contamination risk.
FAQ
Does bacteriostatic water expire faster than sterile water?
No — sterile water must be discarded immediately after opening, while bacteriostatic water can last longer if handled aseptically.
Should bacteriostatic water be refrigerated?
Not necessary, but refrigeration is acceptable if it prevents temperature fluctuations (never freeze).
Can expired bacteriostatic water be used?
No. Expired or cloudy solutions must be discarded immediately.
Compliance Reminder
Herbilabs bacteriostatic water is supplied strictly for Research Use Only (RUO). It is not for medical or veterinary injection.
Conclusion
The bacteriostatic water shelf life makes it a cost-effective and reliable choice for labs that need multiple withdrawals. By storing it correctly and discarding when compromised, you ensure both safety and efficiency in research workflows.
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