Clear Liquid. Surprisingly Important Specification.
BAC Water—Bacteriostatic Water—looks like one of the simplest products in a research-supply catalog.
It is clear.
It is aqueous.
And the name sounds standardized.
But for professional procurement, the name alone does not answer an important question:
What exactly is in this batch?
That distinction matters because products marketed under “BAC Water” may belong to very different categories—from regulated Bacteriostatic Water for Injection, USP to independently manufactured research-grade laboratory solutions.
“BAC Water” Is Not One Chemical Molecule
BAC Water is a formulation, not a single molecular compound.
SUNONE therefore identifies its BAC Water as a mixture, with benzyl alcohol CAS 100-51-6 referenced only for the preservative component where applicable. The product page specifically states that the final composition, preservative concentration, sterility specification, storage conditions and analytical information should be verified against the applicable batch COA and specification.
That is an important analytical distinction.
A mixture should not be described using the CAS number, formula or molecular weight of one ingredient as though those identifiers represented the entire formulation.
Research-Grade BAC Water Is Not Automatically USP Bacteriostatic Water for Injection
This is where Google results often become confusing.
Official Pfizer/Hospira labeling describes Bacteriostatic Water for Injection, USP as sterile, nonpyrogenic Water for Injection containing either 0.9% or 1.1% benzyl alcohol as a bacteriostatic preservative. The labeled pH is 5.7, with a range of 4.5–7.0.
Those specifications describe a particular regulated pharmaceutical product category.
They should not automatically be applied to every research-grade BAC Water product found online.
For B2B buyers, the correct question is therefore not:
“Does BAC Water normally contain 0.9% benzyl alcohol?”
It is:
“What preservative concentration and quality specification apply to the exact batch being quoted?”
Why Buyers Are Searching for BAC Water COA and Testing
Recent community discussions show increasing concern about BAC Water quality.
Some users report satisfactory experiences with third-party products and say the material performed as expected.
Other discussions describe independent testing that allegedly found very low bacteriostatic-component levels or failed sterility results in unrelated commercial samples.
A separate 2026 discussion focused almost entirely on whether the COA itself contained enough information to trust the product.
There have also been reports of unopened third-party BAC Water arriving with visible foreign material. These are anecdotal reports and do not establish how common such problems are, but they illustrate the procurement concern clearly.
For laboratories and distributors:
a clear vial is not analytical evidence.
Even Pharmaceutical Products Depend on Sterility Assurance
Quality control is not merely a concern for research suppliers.
In 2019, Hospira voluntarily recalled one lot of Bacteriostatic Water for Injection, USP because sterilization could not be confirmed for some vials. Pfizer noted that loss of sterility assurance could create a risk of serious bacterial infection if affected material were administered.
That historical recall does not imply a current problem with Hospira or with SUNONE.
It illustrates a broader principle:
for aqueous laboratory formulations, sterility-related specifications and batch documentation can be as important as chemical composition.
What Should a BAC Water Buyer Verify?
When evaluating a BAC Water supplier or Bacteriostatic Water supplier, qualified B2B buyers should review:
Composition — What exactly is present in the formulation?
Preservative specification — Is benzyl alcohol used, and at what batch-defined concentration?
Sterility specification — What sterility requirements apply to this particular research product?
Batch COA — Does the Certificate of Analysis match the production lot being supplied?
Packaging specification — What vial volume, closure system and packaging configuration are provided?
Storage specification — What storage conditions apply to the batch?
The phrase “bacteriostatic water” is a product category.
The specification defines the actual product.
SUNONE BAC Water for B2B Research Supply
SUNONE supplies BAC Water / Bacteriostatic Water for qualified laboratory research, formulation-development and manufacturing workflows.
Current product information includes:
Product: BAC Water
Category: Laboratory Solution
Grade: Research Grade
Form: Liquid / Solution
Composition: According to batch-specific specification and COA
Available Formats: 3 mL × 10 vials and 10 mL × 10 vials
Availability: On request
Documentation: COA, SDS and Specification Sheet.
SUNONE also supports B2B customers requiring defined packaging configurations and larger procurement quantities.
View SUNONE BAC Water Specifications :
Looking for a BAC Water Wholesale or OEM Supplier?
For research distributors, biotechnology businesses and laboratory-supply companies, the strongest sourcing question is not:
“How cheap is the BAC Water?”
It is:
“Can the supplier document the composition and quality specification of the exact batch being supplied?”
If your organization is sourcing BAC Water, Bacteriostatic Water, research-grade laboratory solutions, private-label products or bulk B2B supply, SUNONE can provide current batch specifications, MOQ information, documentation and quotation support.
Conclusion
BAC Water proves that a simple-looking laboratory product can still require careful specification control.
Research-grade BAC Water is not automatically pharmaceutical Bacteriostatic Water for Injection, USP.
A benzyl-alcohol CAS number does not define the entire mixture.
And a clear liquid does not prove composition or sterility.
For professional procurement:
verify the formulation, verify the preservative specification, verify the quality requirements and verify the batch-specific COA.
The simple product name may generate the search.
Batch transparency should generate the inquiry.
This content is provided for scientific and educational purposes only. SUNONE research peptide is for qualified labrtorynt, diagnois, druc tor mmatct or veteimant, use.research only, Not for human consumption, clinical treame. Purchasers are responsible for complying with applicable laws and regulations in their jurisdiction.
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