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How Long Does Bacteriostatic Water Last After Opening?
Bacteriostatic water is a key component in preparing many injectable medications and peptides. But how long does it remain safe to use? In this guide, we'll explore the shelf life of bacteriostatic water when unopened and after opening, along with tips on safe storage and signs of contamination. For a full overview of what it is, start with what is bacteriostatic water? or explore is bacteriostatic water safe?.
Unopened Bacteriostatic Water
When sealed and stored properly, unopened bacteriostatic water typically has a shelf life of 2 to 3 years from the manufacturing date. Check the printed expiration date on the vial for accuracy. For more on shelf life and expiration, visit can bacteriostatic water expire?
After Opening
Once opened, the water is exposed to potential contaminants. Fortunately, the 0.9% benzyl alcohol acts as a preservative. As a general rule:
- Safe usage window: Up to 28 days after the first puncture
- Label the vial: Write the opening date on the label
- Refrigeration: Not required but storing in a cool, dry place is recommended
Need help with preparation? Here’s how to mix peptides with bacteriostatic water safely.
Signs It Should Be Discarded
- Cloudiness or floating particles
- Discoloration
- Expired beyond 28 days post-opening
- Broken seal or cracked vial
Storage Best Practices
To ensure bacteriostatic water remains sterile and safe for injection:
- Store between 20°C to 25°C (68°F to 77°F)
- Avoid direct sunlight or extreme heat
- Keep the vial sealed when not in use
- Always use a clean syringe for each draw
Bacteriostatic water is effective for up to 28 days after opening, assuming it's stored and handled properly. Always follow expiration guidelines to ensure safety and potency of your injections. For trusted sources, check where to buy bacteriostatic water or go directly to the bacteriostatic water product page.