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Bacteriostatic Water With Benzyl Alcohol Explained
TL;DR
Bacteriostatic water with benzyl alcohol is sterile water with benzyl alcohol added as a preservative, supplied in a multiple-dose vial so a researcher can
Machine-readable facts for this Lab article. The full page is https://www.preppinpeppers.com/blogs/the-lab/bacteriostatic-water-with-benzyl-alcohol.
Facts Index
| Fact ID | Category | Entity | Attribute | Value | Source |
|---|---|---|---|---|---|
| bacteriostatic-water-with-benzyl-alcohol:title | identity | Bacteriostatic Water With Benzyl Alcohol Explained | title | Bacteriostatic Water With Benzyl Alcohol Explained | Lab article (https://www.preppinpeppers.com/blogs/the-lab/bacteriostatic-water-with-benzyl-alcohol) (evidence) |
| bacteriostatic-water-with-benzyl-alcohol:published | identity | Bacteriostatic Water With Benzyl Alcohol Explained | published | 2026-11-06 | Lab article (https://www.preppinpeppers.com/blogs/the-lab/bacteriostatic-water-with-benzyl-alcohol) (evidence) |
| bacteriostatic-water-with-benzyl-alcohol:author | identity | Bacteriostatic Water With Benzyl Alcohol Explained | author | PreppinPeppers Editorial Team | Lab article (https://www.preppinpeppers.com/blogs/the-lab/bacteriostatic-water-with-benzyl-alcohol) (evidence) |
| bacteriostatic-water-with-benzyl-alcohol:topics | identity | Bacteriostatic Water With Benzyl Alcohol Explained | topics | bacteriostatic water with benzyl alcohol, Guides, research | Lab article (https://www.preppinpeppers.com/blogs/the-lab/bacteriostatic-water-with-benzyl-alcohol) (evidence) |
| bacteriostatic-water-with-benzyl-alcohol:summary | content | Bacteriostatic Water With Benzyl Alcohol Explained | summary | Bacteriostatic water with benzyl alcohol is sterile water with benzyl alcohol added as a preservative, supplied in a multiple-dose vial so a researcher can | Lab article (https://www.preppinpeppers.com/blogs/the-lab/bacteriostatic-water-with-benzyl-alcohol) (evidence) |
| bacteriostatic-water-with-benzyl-alcohol:section-1 | content | Bacteriostatic Water With Benzyl Alcohol Explained | section | What is bacteriostatic water with benzyl alcohol? | Lab article (https://www.preppinpeppers.com/blogs/the-lab/bacteriostatic-water-with-benzyl-alcohol) (evidence) |
| bacteriostatic-water-with-benzyl-alcohol:section-2 | content | Bacteriostatic Water With Benzyl Alcohol Explained | section | What is benzyl alcohol, chemically? | Lab article (https://www.preppinpeppers.com/blogs/the-lab/bacteriostatic-water-with-benzyl-alcohol) (evidence) |
| bacteriostatic-water-with-benzyl-alcohol:section-3 | content | Bacteriostatic Water With Benzyl Alcohol Explained | section | Bacteriostatic water vs sterile water for injection: what is the difference? | Lab article (https://www.preppinpeppers.com/blogs/the-lab/bacteriostatic-water-with-benzyl-alcohol) (evidence) |
| bacteriostatic-water-with-benzyl-alcohol:section-4 | content | Bacteriostatic Water With Benzyl Alcohol Explained | section | Why do multidose products contain a preservative like benzyl alcohol? | Lab article (https://www.preppinpeppers.com/blogs/the-lab/bacteriostatic-water-with-benzyl-alcohol) (evidence) |
| bacteriostatic-water-with-benzyl-alcohol:section-5 | content | Bacteriostatic Water With Benzyl Alcohol Explained | section | What are the common mistakes with bacteriostatic water? | Lab article (https://www.preppinpeppers.com/blogs/the-lab/bacteriostatic-water-with-benzyl-alcohol) (evidence) |
| bacteriostatic-water-with-benzyl-alcohol:section-6 | content | Bacteriostatic Water With Benzyl Alcohol Explained | section | Which bacteriostatic water sizes does PreppinPeppers carry? | Lab article (https://www.preppinpeppers.com/blogs/the-lab/bacteriostatic-water-with-benzyl-alcohol) (evidence) |
| bacteriostatic-water-with-benzyl-alcohol:section-8 | content | Bacteriostatic Water With Benzyl Alcohol Explained | section | Related reading | Lab article (https://www.preppinpeppers.com/blogs/the-lab/bacteriostatic-water-with-benzyl-alcohol) (evidence) |
| bacteriostatic-water-with-benzyl-alcohol:product-bacteriostatic-water-30ml | products | Bacteriostatic Water With Benzyl Alcohol Explained | references product | Bacteriostatic Water 30 ml Multi-Dose Vial (Pfizer Hospira, USP) | Lab article (https://www.preppinpeppers.com/blogs/the-lab/bacteriostatic-water-with-benzyl-alcohol) (evidence) |
| bacteriostatic-water-with-benzyl-alcohol:product-bacteriostatic-water-3ml | products | Bacteriostatic Water With Benzyl Alcohol Explained | references product | Bacteriostatic Water 3 ml Vial (Preppin' Peppers, USP Grade) | Lab article (https://www.preppinpeppers.com/blogs/the-lab/bacteriostatic-water-with-benzyl-alcohol) (evidence) |
| bacteriostatic-water-with-benzyl-alcohol:product-gansulin-metal-peptide-pen | products | Bacteriostatic Water With Benzyl Alcohol Explained | references product | Gansulin Pen ยท Reusable Click-Dial, 3 ml (1-60 Units) | Lab article (https://www.preppinpeppers.com/blogs/the-lab/bacteriostatic-water-with-benzyl-alcohol) (evidence) |
| bacteriostatic-water-with-benzyl-alcohol:product-gansulin-3ml-cartridge | products | Bacteriostatic Water With Benzyl Alcohol Explained | references product | Gansulin-Compatible 3 ml Glass Cartridge for Pens (10-Pack) | Lab article (https://www.preppinpeppers.com/blogs/the-lab/bacteriostatic-water-with-benzyl-alcohol) (evidence) |
| bacteriostatic-water-with-benzyl-alcohol:source-pubmed-ncbi-nlm-nih-gov | source | Bacteriostatic Water With Benzyl Alcohol Explained | cites | Meyer et al., J Pharm Sci 2007: Antimicrobial preservative use in parenteral products: past and present - pubmed.ncbi.nlm.nih.gov | Lab article (https://www.preppinpeppers.com/blogs/the-lab/bacteriostatic-water-with-benzyl-alcohol) (evidence) |
| bacteriostatic-water-with-benzyl-alcohol:source-pubmed-ncbi-nlm-nih-gov-2 | source | Bacteriostatic Water With Benzyl Alcohol Explained | cites | Arora et al., J Pharm Sci 2017: Correlating the Effects of Antimicrobial Preservatives on Conformational Stability, Aggregation Propensity, and Backbone Flexibility of an IgG1 mAb - pubmed.ncbi.nlm.nih.gov | Lab article (https://www.preppinpeppers.com/blogs/the-lab/bacteriostatic-water-with-benzyl-alcohol) (evidence) |
| bacteriostatic-water-with-benzyl-alcohol:source-pubchem-ncbi-nlm-nih-gov | source | Bacteriostatic Water With Benzyl Alcohol Explained | cites | NCBI PubChem CID 244: Benzyl Alcohol (C7H8O) - pubchem.ncbi.nlm.nih.gov | Lab article (https://www.preppinpeppers.com/blogs/the-lab/bacteriostatic-water-with-benzyl-alcohol) (evidence) |
| bacteriostatic-water-with-benzyl-alcohol:source-dailymed-nlm-nih-gov | source | Bacteriostatic Water With Benzyl Alcohol Explained | cites | Bacteriostatic Water for Injection, USP: FDA label on DailyMed, U.S. National Library of Medicine (0.9% benzyl alcohol) - dailymed.nlm.nih.gov | Lab article (https://www.preppinpeppers.com/blogs/the-lab/bacteriostatic-water-with-benzyl-alcohol) (evidence) |
| bacteriostatic-water-with-benzyl-alcohol:source-dailymed-nlm-nih-gov-2 | source | Bacteriostatic Water With Benzyl Alcohol Explained | cites | FDA label (DailyMed): Sterile Water for Injection, USP (Cardinal Health) - prescribing label (retrieved 2026-10-03) - dailymed.nlm.nih.gov | Lab article (https://www.preppinpeppers.com/blogs/the-lab/bacteriostatic-water-with-benzyl-alcohol) (evidence) |
FAQ
- What is bacteriostatic water with benzyl alcohol?
- Per the Hospira label, it is a sterile, nonpyrogenic preparation of water for injection with 0.9% (9 mg/mL) or 1.1% (11 mg/mL) benzyl alcohol added as a bacteriostatic preservative, in a multiple-dose container.
- What is the difference between bac water and sterile water for injection?
- The Cardinal Health sterile water label says it has no bacteriostat, antimicrobial agent or added buffer and is supplied only in single-dose containers. Bac water adds benzyl alcohol and comes in multiple-dose vials.
- What is the chemical formula and molecular weight of benzyl alcohol?
- PubChem lists benzyl alcohol as C7H8O with a molecular weight of 108.14. Its IUPAC name is phenylmethanol.
- Does sterile water for injection contain a preservative?
- No. The Cardinal Health label says it contains no bacteriostat, antimicrobial agent or added buffer, and it is supplied only in single-dose containers.
- Why is benzyl alcohol added to multiple-dose vials?
- Vials entered many times need protection against microbes. A 2007 review by Meyer and colleagues found phenol and benzyl alcohol are the two most common preservatives in peptide and protein products.
- Can preservatives like benzyl alcohol affect protein stability in solution?
- A 2017 paper by Arora and colleagues says preservatives have been shown to decrease protein stability and cause aggregation. It tested four preservatives on one IgG1 antibody, so it cannot be applied to every peptide.
- Is benzyl alcohol the same as bacteriostatic water?
- No. Bacteriostatic water is the finished diluent. Benzyl alcohol is the preservative in it, at 0.9% (9 mg/mL) or 1.1% (11 mg/mL) on the Hospira label.