USP-grade Bacteriostatic water 30 mL multi-dose vial, USP, 0.9% benzyl alcohol
USP-grade bacteriostatic water for injection, 30 mL multi-dose vial with 0.9% benzyl alcohol. Also available as a 25-vial case.

Bacteriostatic water 30ml multi-dose vial

★★★★★ Pharmacist-reviewed · USP-grade

Bacteriostatic water 30ml is a sterile, non-pyrogenic USP diluent. It contains 0.9% (9 mg/mL) benzyl alcohol as a preservative, and it comes in a multiple-dose vial for repeated withdrawals.1

$17.85
Per vial. Secure checkout by private order link.

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Where to buy now
  • USP-grade — 0.9% (9 mg/mL) benzyl alcohol, per the official label1
  • Per-lot certificate of analysis — documentation with every lot
  • Sealed multi-dose vial — readable lot and expiry
  • Ships across the US — stored at controlled room temperature3
Reviewed by Jaspal Mann, Superintendent Pharmacist Last reviewed: September 5, 2026

Product specification

Specification for bacteriostatic water for injection, USP. Source: official label (DailyMed / Hospira).
Volume30 mL multiple-dose vial1
PreservativeBenzyl alcohol 0.9% (9 mg/mL)1
BaseWater for Injection, USP (H2O)1
pH5.7 (range 4.5 to 7.0)1
SterilitySterile, non-pyrogenic1
ContainerMultiple-dose vial for repeated withdrawals1
Storage20–25 °C (68–77 °F), controlled room temperature3
DocumentationCertificate of analysis available per lot

Why the 30ml vial

The 30 mL vial holds the most volume in the common size range. It suits repeated withdrawals over time. Because the preservative allows repeated entry into the same vial, one 30 mL vial replaces several single-dose units.1 Store it at room temperature. Use aseptic technique on every withdrawal.2,3

What to check on arrival

The label says not to use the product unless the solution is clear and the seal is intact.2 Check that the lot number and expiry match the certificate of analysis. Check that the vial and flip-top seal are undamaged.

Common questions

Is the 30ml vial reusable?

It's a multiple-dose vial, so repeated withdrawals may be made using aseptic technique.1

How is it stored?

At controlled room temperature, 20 to 25 °C (68 to 77 °F).3

What's the difference from sterile water?

Sterile water for injection has no preservative and is usually single-dose; this product's benzyl alcohol allows repeated withdrawals. Learn more on our bac water overview.1

Diluent Use & Reconstitution Acknowledgement. bacwaterstar cannot determine the cause of cloudiness, clumping, precipitation, discoloration, or failed reconstitution after this diluent has been mixed with any third-party peptide, compound, powder, vial, or other material. bacwaterstar does not manufacture, test, authenticate, or guarantee the quality or compatibility of any third-party compound used with our products.

From the official label: for drug-diluent use only; not for use in neonates; preparations with benzyl alcohol should not be used in epidural or spinal anesthesia.2

Sources
  1. Bacteriostatic Water for Injection, USP — Description. DailyMed, U.S. National Library of Medicine. View label.
  2. Bacteriostatic Water for Injection, USP — Indications, Warnings & Precautions (consumer version). DailyMed. View label.
  3. Bacteriostatic Water for Injection, USP — Storage (Hospira, Inc.). DailyMed. View document.