Research Supplies & Solvents · Source-reviewed dossier
Bacteriostatic Water
Source-Reviewed Research Dossier
Bacteriostatic water is a water-based laboratory solvent containing a preservative. The preservative can limit microbial growth, but that does not guarantee sterility after repeated withdrawals or compatibility with every peptide. In one protein study, benzyl alcohol increased clumping under certain reconstitution conditions. Microbial control and molecular stability are therefore separate questions. The actual ingredients, concentration and any sterility claim need product-specific documentation, followed by compatibility testing for the experiment. This is a research supply, not a treatment.
Compound overview
Shared values below are consolidated from the current catalog record. They are not independent verification or lot results; request the applicable product specification and ask which lot records are available before ordering.
Product identity
- Product type
- Research solution or laboratory supply
- Catalog family
- Bacteriostatic Water
- Research category
- Research Supplies & Solvents
- Catalog CAS RN
- 7732-18-5
- Catalog molecular formula
- H2O
- Catalog molecular weight
- 18.02 g/mol
- Identity boundary
- Water is the vehicle; benzyl alcohol concentration, pH and container details belong to the complete formulation specification.
- Evidence status
- Authoritative labeling and formulation-compatibility evidence
- Intended use
- Research, development and manufacturing use only
Literature reference parameters
- Compound or material class
- Preserved sterile diluentCatalog-family identity
- Evidence scope
- Authoritative labeling and formulation-compatibility evidenceDo not generalize beyond the cited model
- Source review
- Primary or authoritative records linked belowChecked 2026-09-01
Identity safeguard Reference identifiers above describe the literature compound record. Confirm the supplied form, formula, molecular weight, purity and storage conditions against the applicable product specification and any available lot records.
How Bacteriostatic Water is studied
A target-to-pathway view grounded in the linked research records.
Reported research findings
What published studies report about Bacteriostatic Water
Reported outcomes are paired with their experimental model and evidence boundary.
0.9% benzyl alcohol is the labeled preservative
The referenced U.S. label states 9 mg/mL benzyl alcohol, multiple-dose use and a neonatal warning.
This is a regulated finished-product label used to establish the formulation concept, not evidence that this catalog lot is the same product.
Read the primary studyPreservative compatibility is protein-specific
Benzyl alcohol promoted aggregation of recombinant IL-1 receptor antagonist under some lyophilized-formulation conditions.
PMID 15614819 demonstrates a compatibility risk; it does not predict behavior for every peptide.
Read the primary studyCatalog options
Variant specifications
Pack-level catalog data; lot-level controls remain document-specific.
Specification & documents for WA3
Product specification
Laboratory research solution · 3 ml/vial nominal fill · 10-vial pack · concentration, formulation and fill volume controlled by lot specification.
Lot documentation
Document availability and scope must be confirmed for this variant and lot in the written quotation. A catalog description is not a lot-specific test result.
Specification & documents for WA10
Product specification
Laboratory research solution · 10 ml/vial nominal fill · 10-vial pack · concentration, formulation and fill volume controlled by lot specification.
Lot documentation
Document availability and scope must be confirmed for this variant and lot in the written quotation. A catalog description is not a lot-specific test result.
Quality documentation
A listed document is not proof of availability for this lot. Ask the team to confirm the current COA status and the scope of any other records before ordering.
Analytical interpretation
Interpret the documents, not just the headline number.
Use the source-reviewed guide to separate chromatographic area purity, quantitative assay, LC-MS identity, composition and stability evidence before comparing variants or requesting a lot record.
Open the Quality & Documentation HubHPLC area ≠ assayA dominant peak does not establish target mass fraction.
Intact mass ≠ full sequenceIdentity strength depends on resolution and orthogonal evidence.
Counterions affect contentWater, salt form and solvents change the as-is composition.
Storage needs a data basisShipping practice is not the same as stability evidence.
Evidence map
Research context
Published studies and regulatory records, not customer testimonials or usage guidance.
0.9% benzyl alcohol is the labeled preservative
This is a regulated finished-product label used to establish the formulation concept, not evidence that this catalog lot is the same product.
View primary recordPreservative compatibility is protein-specific
PMID 15614819 demonstrates a compatibility risk; it does not predict behavior for every peptide.
View primary recordCurated references
Third-party publications selected for direct relevance.
-
01
Authoritative label
Bacteriostatic Water for Injection, USP
DailyMed current labeling record; benzyl alcohol 9 mg/mL.
-
02
Formulation study
Effects of benzyl alcohol on protein aggregation
Zhang Y, et al. Journal of Pharmaceutical Sciences. 2005. PMID 15614819.
Bacteriostatic Water questions
Concise answers for researchers comparing identity, evidence and catalog variants.
What effects are studied for Bacteriostatic Water?
The benzyl alcohol preservative discourages microbial growth, which allows a multi-dose container to be handled over several sessions. In the lab, that means fewer containers opened and less waste across a series of reconstitutions. The trade-off is that the preservative becomes part of the solution your material sits in, so it can affect the material. Plain water avoids that interaction but offers no protection once opened.
How should the Bacteriostatic Water research findings be understood?
A regulatory label states what a finished product contains and how it is intended to be used. A formulation study shows what happened to one protein under defined conditions. Neither automatically describes a research material, which is a research supply defined by its own specification: preservative concentration, pH range, container and lot documents. A catalog item is not a branded finished drug. Treat compatibility and identity as separate checks, each backed by its own documentation.
What evidence is available for Bacteriostatic Water?
Authoritative labeling defines the common 0.9% benzyl-alcohol formulation, while published work shows why protein-specific compatibility testing is necessary.
Does the cited research validate this catalog material?
No. The cited records describe their own intervention, formulation, model and controls. They do not verify the identity, purity, sterility, safety or efficacy of a catalog lot.
Which quality documents can be requested?
A lot-specific COA, product specification sheet and analytical method summary can be requested where applicable.
How should Bacteriostatic Water be stored?
Store at 2-8 °C. Do not freeze. Protect from light. Confirm the applicable storage statement on the product-specific specification and lot documentation.
Knowledge tools
Continue with structured evidence
Move from this dossier into canonical evidence maps, verified status records, analytical interpretation and laboratory calculations.
Claims were checked against the linked primary publication, regulatory label or authoritative compound record. Published findings stay attached to their study model, formulation and route. Catalog identity and lot quality remain controlled by the applicable specification and lot-specific documents.
Technical procurement
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Selected: WA3 · 3 ml × 10 vials