Bacteriostatic Water

Bacteriostatic Water, also shortened to Bac Water, is listed here as a liquid laboratory consumable in a nominal 10 ml format. Its intended specification is Water for Injections (WFI) with 0.9% benzyl alcohol as preservative. WFI, the preservative identity and its concentration are not presented as established characteristics until each has been reconciled with the supplier data sheet and the documentation assigned to the batch offered.

The product name alone cannot establish composition or water grade. Laboratory receipt records should connect the catalogue identity and nominal format with the label, supplier data sheet and batch-specific record. This distinction also prevents a published water-grade definition from being mistaken for evidence about this particular article.

Reference context: USP-NF · Sterile Water for Injection · DOI 10.31003/USPNF_M88870_05_01

In the harmonised technical glossary reported by McDonnell and colleagues, “bacteriostatic” describes inhibition of bacterial growth. Such inhibition does not necessarily cause cell death or loss of viability. “Bactericidal”, by contrast, describes the ability to inactivate bacteria. The terms therefore identify different microbiological concepts and should not be used interchangeably.

Neither term is a synonym for “sterile”. Sterility is a separate microbiological status, whereas bacteriostatic and bactericidal describe effects on bacteria. A preservative declaration consequently does not, by itself, establish sterility, bactericidal activity or conformity with a pharmacopoeial grade. This page makes no sterility claim for the listed article.

For this product, benzyl alcohol and its stated concentration remain part of the intended specification pending documentary reconciliation. The glossary supports the terminology only; it does not identify the material, establish its composition or document a supplied batch.

Source: McDonnell et al. 2021 · PMID 34845101 · DOI 10.5731/pdajpst.2021.012706

The entries below describe published reference documents for water grades and microbiological terminology. They define categories; none of them documents the identity, composition or batch of the article listed here.

Sources: McDonnell et al. 2021 · PDA J. Pharm. Sci. Technol. 75(6):553-570 · PMID 34845101 · EMA/CHMP/CVMP/QWP/496873/2018 · USP-NF · Sterile Water for Injection

The listed format is a nominal 10 ml. That catalogue statement should be matched to the physical label and stock record during goods-in control. Product designation, item reference and batch or lot identifier should remain legible and should correspond across the container, procurement record and accompanying documentation.

Composition is document-dependent. The intended WFI water component, intended benzyl alcohol preservative and intended 0.9% concentration become confirmed product particulars only after reconciliation with the supplier data sheet and relevant batch document. A record belonging to another lot, a comparable product or a published monograph cannot establish those particulars for the supplied batch.

Batch documentation should allow the laboratory to trace the declared composition, applicable test criteria and results, test or manufacturing date, release status and the material identifier. Any analytical value must be reported only for the batch to which its certificate is unambiguously assigned. No blanket purity or sterility claim is made here. Storage conditions and shelf life likewise must come from released supplier documentation; no generic condition is inferred from the product category.

Reference definitions: EMA water-quality guideline, 2020 · USP-NF · Sterile Water for Injection

This article is presented as a research supply for European laboratories. The useful procurement record is therefore documentary: a clear product identity, nominal format, labelled batch identifier and records that correspond to the material received. Published terminology and water-grade references help laboratories interpret categories, but they do not replace the supplier data sheet, label or batch-specific documentation.

The intended specification remains deliberately distinct from a confirmed batch description. Laboratory purchasers should assess suitability within their controlled procurement and research framework, using the released documents assigned to the stock concerned. No operational, preparation or use protocol is provided here.

Research use only. For laboratory research only. Not for human or veterinary use. Not intended to diagnose, treat, cure or prevent any disease. Not a medicinal product, food or cosmetic.