USP-grade Bacteriostatic water 10 mL multi-dose vial, USP, 0.9% benzyl alcohol
USP-grade bacteriostatic water for injection, 10 mL multi-dose vial with 0.9% benzyl alcohol.

Bacteriostatic water 10ml multi-dose vial

★★★★★ Pharmacist-reviewed · USP-grade

Bacteriostatic water 10ml is a sterile, non-pyrogenic USP diluent with 0.9% (9 mg/mL) benzyl alcohol, in a smaller multiple-dose vial.1

$13.65
Per vial. Secure checkout by private order link.

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  • USP-grade — 0.9% benzyl alcohol, per the official label1
  • Per-lot certificate of analysis — with every lot
  • Smaller format — sealed multi-dose vial, readable lot & expiry
  • Ships across the US — controlled room temperature3
Reviewed by Jaspal Mann, Superintendent Pharmacist Last reviewed: September 6, 2026

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Product specification

Specification for bacteriostatic water for injection, USP. Source: official label (DailyMed / Hospira).
Volume10 mL multiple-dose vial1
PreservativeBenzyl alcohol 0.9% (9 mg/mL)1
BaseWater for Injection, USP1
pH5.7 (range 4.5 to 7.0)1
SterilitySterile, non-pyrogenic1
Storage20–25 °C (68–77 °F)3
DocumentationCertificate of analysis available per lot

10ml or 30ml: which to pick

The 10 mL vial suits smaller or shorter-term needs. It's the same product as the 30 mL, just less volume. If you use bac water regularly, the 30 mL vial usually costs less per mL. If you use it occasionally, the 10 mL keeps things simple. Both are multi-dose vials with the same 0.9% benzyl alcohol preservative, so both behave the same once opened.1

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 seal are undamaged.

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 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

Common questions

Is the 10ml vial reusable?

Yes. 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

Is 10ml the same product as 30ml?

Yes. Same USP formulation and preservative, just a smaller vial. See the 30 mL option for larger needs.

See the 30 mL vial What is bac water?

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, 20–25 °C (Hospira, Inc.). DailyMed. View document.