Bac water 3ml 10 pack gives you ten 3ml vials of bacteriostatic water for peptide reconstitution. Learn storage, shelf life, and how to choose.
A bac water 3ml 10 pack is a bundle of ten sealed vials of bacteriostatic water — sterile water preserved with 0.9% benzyl alcohol — used to reconstitute lyophilized peptides, research compounds, and certain prescription drugs. Each vial holds 3 milliliters, so the pack delivers 30 ml total in ten small containers that can each be punctured and resealed with a stopper. The format is popular because it lets you start fresh with a new vial instead of repeatedly entering one larger bottle.
This guide covers what is actually inside the pack, how the 3ml size compares with bac water 10ml and 30ml vials, and how to store and handle it safely.
What Comes in a Bac Water 3ml 10 Pack
Every vial in the pack contains the same basic solution: sterile water for injection plus 0.9% benzyl alcohol as a bacteriostatic preservative. The preservative does not sterilize a contaminated vial; it simply slows bacterial growth so a vial can be entered more than once.
- Vial count: 10 individual vials
- Volume per vial: 3 ml, roughly 300 units on a U-100 insulin syringe
- Total volume: 30 ml across the pack
- Preservative: 0.9% benzyl alcohol
- Typical labeling: "for research use only" or "not for human use" from most online suppliers
Bacteriostatic water contains 0.9% benzyl alcohol, which is what separates it from plain sterile water and makes multi-dose use possible.
Why Buy 3ml Vials in a 10 Pack?
Small vials paired with a bulk count solve two practical problems at once: freshness and cost per vial.
- Less waste. A 3ml vial suits protocols that need only a few milliliters of diluent. Opening a 30ml bottle for 2ml of use leaves the rest aging in the refrigerator.
- Lower unit risk. If one vial is compromised, you discard one 3ml vial instead of an entire 30ml supply.
- Better per-ml pricing. Bulk packs almost always cost less per milliliter than single vials, and shipping is spread across ten units.
- Cleaner bench organization. Researchers comparing different diluent volumes can keep several separate, labeled vials on hand.
If your protocol needs larger volumes for a single reconstitution, bac water 10ml is usually the more economical step up.
3ml vs 10ml vs 30ml Bac Water: Comparison
| Vial size | Typical benzyl alcohol | Best suited for | Discard after opening | Common sellers |
|---|---|---|---|---|
| 3 ml | 0.9% | Single peptide vial, small research batches, travel | ~28 days | Research supply sites, bulk 10 packs |
| 10 ml | 0.9% | Repeated reconstitutions of the same compound | ~28 days | Research supply sites, some pharmacies |
| 30 ml | 0.9% | High-volume lab or clinical reconstitution | ~28 days | Hospira/Pfizer, hospital distributors, pharmacies |
There is no single "best" size. The right choice depends on how much diluent one reconstitution consumes and how quickly you will finish the vial.
How to Reconstitute Peptides With Bac Water
The same basic steps apply whether you are working with a 3ml vial or a larger one. Work on a clean surface, and swab every stopper with alcohol before and after entry.
- Sanitize. Wipe the peptide vial stopper and the bac water stopper with a fresh alcohol swab. Let both air dry.
- Draw the diluent. Insert the needle at an angle and let pressure equalize. Pull the plunger slowly to avoid foaming.
- Add slowly. Aim the stream at the glass wall, not directly at the powder. Swirl gently instead of shaking, because shaking can damage fragile peptides.
- Label the vial. Write the reconstitution date and concentration on the label. Discard the diluent vial about 28 days after first entry.
- Store correctly. Keep the reconstituted solution refrigerated between 36°F and 46°F (2–8°C). Do not refreeze it.
People who keep a standing supply of diluent for lab work often search for bac water for peptides by volume first and brand second, because vial size drives cost more than the label does.
Storage and Shelf Life
Unopened bacteriostatic water should be kept at controlled room temperature, away from direct light and out of the freezer. Freezing does not improve stability and can crack the glass vial.
Most manufacturers recommend discarding a punctured vial of bacteriostatic water after 28 days. That 28-day window is a standard, conservative rule for multi-dose vials, and it applies even if the solution still looks perfectly clear.
Inspect every vial before use. Cloudiness, visible particles, or a damaged seal mean the vial should be thrown away, not used.
Bac Water Safety, Sourcing, and Legal Status
Bacteriostatic water is not interchangeable with every diluent. Benzyl alcohol is not appropriate for certain routes of administration, and it should never be used to reconstitute a drug intended for intrathecal or epidural injection.
Many researchers specifically ask for bac water hospira because the Hospira line, now part of Pfizer, is the brand most often associated with prescription-grade bacteriostatic water in the United States. Pharmaceutical-grade bacteriostatic water is regulated as a prescription product in the US. Most 3ml vials sold online, however, are labeled "for research use only" and are not intended for human injection.
If you are unsure where to buy bac water, start with a licensed pharmacy or a supplier that publishes a certificate of analysis and a lot number. Results for bac water near me searches often reflect local pharmacy markups, so online research suppliers are frequently cheaper — but cheaper is not the same as pharmaceutical grade.
When handled correctly, bac water for injection is a straightforward diluent, and it still deserves the same care as any other injectable supply. Anyone using bacteriostatic water as part of a prescribed treatment should follow their clinician's instructions on volume, storage, and disposal. For personal health decisions, talk with a licensed healthcare professional rather than relying on supplier marketing.
Bacteriostatic water is a diluent, not a treatment, and it makes no therapeutic claims of its own.
Frequently Asked Questions
How long does bacteriostatic water last after you open it?
Most manufacturers recommend using a punctured vial within 28 days, then discarding it. Unopened vials should be stored at controlled room temperature and kept out of the freezer. If the solution looks cloudy or contains particles, throw it away regardless of the date on the label.
Is bac water the same as sterile water?
No. Bacteriostatic water contains 0.9% benzyl alcohol, a preservative that slows bacterial growth and allows a vial to be entered more than once. Plain sterile water has no preservative and is intended for single use. Because of the benzyl alcohol, bacteriostatic water is not appropriate for every route of administration.
Is a 3ml 10 pack of bac water legal to buy in the US?
Prescription-grade bacteriostatic water, such as the Hospira product, is regulated as a prescription item in the United States. Many 3ml vials sold online are labeled for research use only, which means they are not intended for human injection. Buying those vials for personal injection use falls outside that labeling.
This page provides educational research information and does not replace medical advice, diagnosis, or treatment.