Introduction
Bacteriostatic water is widely used in labs across Europe, but what exactly is in it? Understanding the Composition of Bacteriostatic Water is crucial for proper handling, storage, and application in research.
In this article, we’ll break down the formula, explain why benzyl alcohol is included, and highlight how composition affects lab use.
(Note: All Herbilabs products are sold strictly for Research Use Only (RUO) — not for human or veterinary use.)
Basic Formula
- 99.1% Sterile Water – purified and sterilized to eliminate contaminants
- 0.9% Benzyl Alcohol – a preservative that inhibits bacterial growth
This simple combination makes bacteriostatic water both sterile and multi-use, unlike sterile water which lacks preservatives.
Why 0.9% Benzyl Alcohol?
Benzyl alcohol is a well-known preservative in laboratory and pharmaceutical contexts. At 0.9% concentration:
- It prevents bacterial growth in opened vials
- Extends shelf life for multi-use applications
- Maintains solution clarity and stability
- Is safe for laboratory handling when used as directed
How Composition of Bacteriostatic Water Affects Lab Applications
- Reconstitution of powders – sterile water with preservative extends usability.
- Dilutions – ensures sterile conditions for repeated sample prep.
- Storage – prevents microbial contamination during short-term storage.
- Lab efficiency – fewer discarded vials compared to sterile water.
Common Misconceptions
- “It’s just sterile water.” → No, the added benzyl alcohol is what makes it bacteriostatic.
- “Higher benzyl alcohol = better.” → Incorrect; 0.9% is the optimal balance.
- “Composition varies between suppliers.” → Reliable suppliers follow the standard 99.1% + 0.9% formulation.
FAQ
Is benzyl alcohol toxic?
At lab-use concentrations (0.9%), it is safe for research applications. However, Herbilabs products are RUO and not for human or veterinary injection.
Can composition differ outside the EU?
No — reputable suppliers globally adhere to the same standard formulation.
Does benzyl alcohol affect research results?
Not when used in appropriate contexts; always follow your lab’s SOPs.
Compliance Reminder
Herbilabs products are labeled Research Use Only (RUO). Not for medical or veterinary injection, treatment, or consumption.
Conclusion
The composition of bacteriostatic water is both simple and effective: sterile water combined with 0.9% benzyl alcohol. This formulation gives labs a sterile, multi-use solution with extended shelf life and reduced waste.
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