Pfizer Hospira Bac Water: What It Is, Who Makes It, and How to Buy It

Pfizer Hospira bac water is Bacteriostatic Water for Injection, USP — sterile water containing 0.9% benzyl alcohol as a preservative — made by Hospira, the injectable-drug business Pfizer acquired in 2015. It ships in multi-dose glass vials and is used to dissolve or dilute powdered injectable medications. It is a prescription-labeled hospital product, not a wellness supplement, and it is not intended for unsupervised human use.

What Bacteriostatic Water Actually Is

Bacteriostatic water starts as highly purified water that has been sterilized and tested for endotoxins. A small amount of benzyl alcohol — 0.9%, or about 9 mg per mL — is added so bacteria cannot multiply inside the vial. That single additive is what separates bacteriostatic water from plain sterile water for injection.

The preservative is why one vial can be entered more than once. A pharmacist, nurse, or lab technician can draw several doses from the same container over days or weeks without the contents spoiling. Sterile water without a preservative has to be used immediately or thrown away.

• What it is: sterile, nonpyrogenic water with 0.9% benzyl alcohol.
• What it does: dissolves and dilutes powdered or concentrated injectable drugs.
• What it is not: saline, plain sterile water, or anything meant for oral or topical use.

Pfizer, Hospira, and Why the Name on the Vial Matters

Hospira was an independent injectable manufacturer until Pfizer bought the company in 2015. The Hospira name still appears on the label, so Pfizer bac water and Hospira bac water describe the same product line. Pfizer's Hospira unit supplies hospitals, compounding pharmacies, and licensed distributors rather than selling directly to consumers.

The brand matters for traceability more than for marketing. A genuine Pfizer Hospira vial carries a National Drug Code, a lot number, and an expiration date that can be verified, and the fill is produced under FDA-inspected sterile manufacturing conditions.

Unverified sterility is the single biggest risk with any injectable diluent, and counterfeit vials rarely provide a traceable lot number.

Vial Sizes and Packaging Options

Hospira bacteriostatic water is most often stocked as a 30 mL multi-dose vial, the format hospitals and compounding pharmacies buy. Case quantities and smaller fills also move through medical suppliers, and buyers frequently search for hospira bac water 10ml or a single bac water 30ml vial depending on how much they need. A hospira bacteriostatic water 25 pack is usually a clinic-sized order rather than a personal one.

Format	Typical fill	Best suited for	Notes
Small multi-dose vial	3 mL to 10 mL	One or two reconstitutions	Often repackaged; verify the source
Standard multi-dose vial	10 mL	Small clinics and individual routines	Common pharmacy shelf size
Large multi-dose vial	30 mL	Hospitals, compounding, research labs	Most widely stocked Hospira size
Case pack	25 x 30 mL	Clinics buying in bulk	Long shelf life if stored correctly

Bac Water vs. Sterile Water vs. Saline

These products look identical in a clear vial and are not interchangeable. The wrong diluent can change a drug's stability, cause pain at the injection site, or create a genuine safety problem.

Product	Preservative	Safe for multi-dose use	Typical role
Bacteriostatic Water for Injection, USP	0.9% benzyl alcohol	Yes	Reconstituting drugs used over several days
Sterile Water for Injection, USP	None	No	Single-use dilution and large-volume compounding
Bacteriostatic Sodium Chloride 0.9%, USP	0.9% benzyl alcohol	Yes	Diluting drugs that require an isotonic diluent
Sodium Chloride 0.9%, USP	None	No	IV fluids and single-dose dilution

Bacteriostatic water and sterile water for injection are not interchangeable, because the preservative that makes bac water multi-dose safe is also the reason it must be avoided in certain patients and routes.

Why People Search for Bac Water for Peptides

Most searches for bac water for peptides come from people reconstituting lyophilized research peptides at home. The math is straightforward: the volume of diluent you add sets the concentration, so 2 mL of water added to a 5 mg vial yields roughly 2.5 mg per mL.

Two limits are worth stating plainly. Research peptides sold online are not FDA-approved drugs, and adding pharmaceutical-grade diluent does not change that. Home reconstitution also cannot match the sterility of a licensed pharmacy cleanroom, so contamination risk is real.

If a substance is being prepared for human use, that decision belongs with a licensed healthcare professional who can confirm the drug, the dose, and the correct diluent.

Safety, Storage, and Handling

Bacteriostatic water is a medicine, not a supply item, and it deserves the same handling care as any injectable.

• Store at controlled room temperature, roughly 20 to 25 degrees Celsius (68 to 77 degrees Fahrenheit), and never freeze it.
• Keep the vial sealed until use, and swab the stopper with alcohol before every entry.
• Inspect each vial for cloudiness, discoloration, or particles, and discard it if anything looks off.
• Follow the labeled beyond-use period once a multi-dose vial has been punctured.

Benzyl alcohol is the reason bacteriostatic water carries warnings. Benzyl alcohol is not safe for newborns, and solutions containing it should not be given by epidural or intrathecal routes. Pregnant patients and anyone with a known sensitivity should ask a clinician first.

Bacteriostatic Water for Injection, USP is labeled for prescription use in the United States, so a pharmacist or prescriber is the right person to confirm whether it fits a particular medication.

How to Spot Counterfeit or Mislabeled Vials

Repackaged and counterfeit diluents do circulate, especially through marketplace listings. A few checks catch most problems.

1. Verify the National Drug Code on the vial against Pfizer's published product listing.
2. Confirm the lot number and expiration date are printed on the label, not handwritten or stickered over.
3. Inspect the crimp seal and rubber stopper for signs of tampering.
4. Buy only from licensed US distributors, hospital suppliers, or pharmacies.

A price far below the market rate for a sterile injectable is a warning sign, not a bargain. Buyers searching for bac water for injection should confirm the label reads Bacteriostatic Water for Injection, USP before they pay.

What to Check Before You Order

Buying bac water is a supply-chain decision as much as a product decision. Confirm the seller is licensed to ship prescription injectables into your state, and confirm the listing states USP grade.

Chasing a premium research-grade diluent usually leads back to the same answer: USP-grade bacteriostatic water from a licensed manufacturer with an intact sterility seal and a verifiable lot number. There is no meaningful quality tier above that.

If you have any doubt about whether bacteriostatic water is appropriate for a specific drug or patient, ask a pharmacist or physician before you use it.

COMMON QUESTIONS

Frequently Asked Questions

Is Pfizer Hospira bac water the same thing as bacteriostatic water?

Yes. Pfizer Hospira bac water is Bacteriostatic Water for Injection, USP. Hospira is the injectable-drug business Pfizer acquired in 2015, and the product is sterile water with 0.9% benzyl alcohol added as a preservative.

Do you need a prescription to buy Hospira bacteriostatic water?

Bacteriostatic Water for Injection, USP is labeled for prescription use in the United States. Some sellers require a prescription or a verified licensed-account status, and rules vary by state, so confirm the requirement with the distributor before ordering.

How long does bac water last after the vial is opened?

Once a multi-dose vial is punctured, many healthcare facilities follow a 28-day beyond-use limit, but the manufacturer's label always takes precedence. Store it at room temperature, never freeze it, and discard the vial if the solution becomes cloudy or contains particles.