How Long Is BAC Water Good For?
- WilliamDylan
Bacteriostatic water (BAC water) is generally good until its expiry date if it remains unused and is stored properly. For opened multidose vials, 28 days is commonly referenced as a general timeframe unless the manufacturer specifies a different period. BAC water’s usability and safety depend on storage conditions. Peptides in BAC water may also require special storage and stability conditions. In this blog post, we discuss BAC water shelf life and how to store it properly.
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BAC Water Shelf Life at a Glance
Bacteriostatic water can normally maintain its viability until its printed expiry date if it has not been opened and has been stored properly. Once punctured, the normal shelf life of bacteriostatic water is 28 days from the date of first puncturing. Room-temperature storage of BAC water will not extend the 28-day shelf life after puncturing. If the bottle is damaged, throw it away.
| Condition | Shelf-Life Guidance |
|---|---|
| Sealed BAC water | Until the printed expiration date |
| Opened BAC water | Commonly 28 days after first puncture |
| Refrigerated BAC water | Follow the manufacturer's storage and in-use instructions; refrigeration does not automatically extend the in-use period |
| Room-temperature BAC water | Follow the manufacturer's storage instructions |
| Frozen BAC water | Avoid unless the manufacturer specifically permits freezing |
| Heat-exposed BAC water | Do not use if storage conditions exceeded the label's limits |
| Damaged vial | Discard if the seal, stopper, or vial is damaged |
| BAC water mixed with peptides | Depends on the specific peptide and its stability requirements |
THE 28-DAY GUIDANCE: Once a multidose BAC water vial is punctured, its in-use period becomes an important consideration. A 28-day period is commonly referenced for opened multidose vials, but the manufacturer’s specific instructions should take priority if they provide a different timeframe. Refrigeration does not automatically extend the permitted in-use period.
Where Does the 28-Day Rule Come From?
This guideline comes from the time frame commonly used for opened multidose vials. This is based on guidance for multidose vials, including USP General Chapter 797, while the specific in-use period may depend on the manufacturer’s instructions. The CDC also suggests dating opened multidose vials and discarding them after 28 days unless the manufacturer states a different time period. It depends on the manufacturer’s guidelines, which may be shorter or longer than 28 days.
Does the BAC Water Label Say 28 Days?
Not all BAC water labels mention a 28-day period after opening. For example, Hospira BAC water labelling indicates that this is a multidose vial and must be stored between 20-25 degrees Celsius (68-77 degrees Fahrenheit). The 28-day period is commonly referenced as general guidance for opened multidose vials; it should not automatically be treated as the labeled in-use period for every BAC water product.
What Happens If You Use BAC Water After 28 Days?
Here are the key things to know about using BAC water after the recommended 28-day period:
- Increased risk of contamination: Repeated punctures increase the risk of contamination by allowing microorganisms to enter.
- The 28-day timeframe: The period is generally applied to opened multi-dose vials where no manufacturer-specific period exists.
- Preservative limitations: Benzyl alcohol prevents microbial growth; however, it does not make an opened vial permanently sterile and safe.
- Storage cannot reset the time frame: Refrigeration of the vial will not restart or prolong the recommended time frame.
- Safer alternative: Discard the vial after the recommended time frame, especially if you have any concerns about sterility.
Does BAC Water Need to Be Refrigerated?
Refrigeration of bacteriostatic water is not absolutely necessary as it can be kept at a controlled room temperature. You must always consider instructions for storing that are found on the label of the product. Some products can be refrigerated. But refrigeration will not increase the time period for which you may keep the opened vial.
PEPTIDE STABILITY: Once BAC water is mixed with a peptide, storage requirements depend on the specific peptide and its stability data. Do not assume every reconstituted peptide requires the same temperature or storage period.
Does Unopened BAC Water Need to Be Refrigerated?
Unopened BAC water typically does not require refrigeration, except when the manufacturer directs it. Store it properly, follow the label instructions, and keep it out of high temperatures and direct sunlight. If stored properly, unopened BAC water usually remains safe to use until its expiry date.
Does BAC Water Need to Be Refrigerated After Opening?
If already opened, BAC water should normally be stored at normal room temperature if the packaging of the product specifies this. Store it in a cool, dry environment, away from heat and sunlight. Some products can be refrigerated, but this does not extend their shelf life beyond 28 days from first puncture.
How Can You Tell If BAC Water Has Gone Bad?
Here are some common signs that BAC water may no longer be suitable for use:
- Haze or cloudiness: The solution must be clear at all times. Avoid using the solution if it becomes hazy.
- Particles: Particles or any foreign matter signify contamination.
- Color change: Never use the solution if there is an abrupt change in colour.
- Formation of precipitate: Precipitate formation in the vial is another sign of contamination.
- Damaged stopper or seal: Damaged seals or stoppers may affect the sterility of the vial.
- Past expiry or unknown opening: Do not use the BAC water or the vial opened for an unspecified period of time.
What Does the Benzyl Alcohol Preservative Actually Do?
Benzyl alcohol is an ingredient of bacteriostatic water used as a preservative. This term means a substance that inhibits microorganisms from reproducing, while bactericidal means a substance that kills microorganisms. Benzyl alcohol does not render BAC water entirely free of microorganisms or sterile.
How to Store BAC Water?
Here are some important tips on how to store BAC Water.
- Never open BAC water until you are ready to use it.
- Store BAC water according to the label directions.
- The date of first opening of BAC water should be noted.
- Swab the rubber stopper before each withdrawal.
- Use a new sterile needle for each withdrawal.
- Always note signs of contamination before using BAC water.
- Always dispose of BAC water within the specified time frame.
- Discard BAC water if you are unsure of the storage or opening dates.
Frequently Asked Questions
Here are some common questions about BAC water shelf life, storage, and safe handling:
Does bacteriostatic water go bad?
Yes. Bacteriostatic water may lose its suitability due to its expiration date, contamination, poor storage conditions, or extended use after opening.
Does BAC water need to be kept cold?
No. Most BAC water drugs are stored at controlled room temperature, but follow the manufacturer’s storage directions.
Can I keep using BAC water beyond 28 days?
Generally, it is recommended to throw away an opened multi-dose vial of the drug after 28 days unless the manufacturer recommends otherwise.
Does refrigeration make BAC water last longer?
No. Refrigeration does not automatically extend the recommended in-use period after you puncture a vial. Follow the manufacturer’s instructions.
Is BAC water still valid past its expiration date?
No. BAC water should not be used beyond its expiration date. This date is effective only in case of proper storage of the product.
Conclusion
The shelf life of BAC water depends on whether the vial is open or unopened. Unopened vials of BAC water will remain safe until the expiry date, as long as they are stored appropriately. In case of opened vials, follow the instructions from the manufacturer concerning the period in use. Proper handling, appropriate storage conditions, and examining the vial before use will reduce the risk of contamination.
All Vial Sizes
Facts About Hospira Bac Water
- Hospira, Inc. (a Pfizer company)
- Benzyl Alcohol 0.9% (9 mg/mL)
- 30 mL multiple-dose vial
- Store at Controlled Room Temperature
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