Bacteriostatic water, USP-grade and pharmacist-reviewed
Bacteriostatic water is sterile, non-pyrogenic water with 0.9% (9 mg/mL) benzyl
alcohol added as a preservative, supplied in a multi-dose vial you can draw from more
than once.1 We stock the verified USP-grade product and
publish plain-language guides reviewed by a pharmacist.
Whether you want to understand what bac water is or buy a verified vial, start here. Every product is USP-grade with per-lot documentation, and every guide is sourced to the official label and reviewed by a Superintendent Pharmacist.
Shop by size
Bacteriostatic water 30 mL
The most common multi-dose vial.
Bacteriostatic water 10 mL
Smaller-format option.
Hospira bacteriostatic water
Genuine Hospira (Pfizer) brand.
Where to buy
Pharmacies vs online, and how to verify quality.
Learn about bacteriostatic water
What is bac water?
The complete guide to composition, uses and safety.
Bacteriostatic vs sterile water
The difference is the preservative.
How long does it last?
Shelf life, storage and the 28-day window.
For injection (USP spec)
The full injection-grade specification.
Why buy from us
- USP-grade product with a named manufacturer and per-lot certificate of analysis
- Sealed vials with readable lot and expiry
- Guides sourced to the official label and reviewed by a pharmacist
- US shipping, honest availability
Shop 30 mL Start with the guide
- Bacteriostatic Water for Injection, USP — Description. DailyMed, U.S. National Library of Medicine. View label.