Toners
Bacteriostatic Water 10ml
$10.00
- Free US shipping over $150
- HPLC-tested at 99%+ purity
- US-based fulfillment
Overview
Description
A sterile dilution solution commonly used to reconstitute lyophilized compounds in research settings. Designed to support clean handling and multi-use workflows.
This is a standard lab utility item for peptide preparation, helping maintain stability and sterility during routine research use.
Scientific Overview
Bacteriostatic water is sterile water containing a preservative (commonly benzyl alcohol) intended to inhibit bacterial growth after vial puncture. In laboratory environments it is used as a preparation solvent for reconstitution and controlled handling procedures. Storage and handling should follow sterile technique and label instructions.
Product Details
This product is intended strictly for laboratory research purposes only. It is not approved for human or veterinary use by the FDA or any other regulatory agency. Store as directed on the label and handle using appropriate laboratory and aseptic techniques.
- Product: Bacteriostatic Water (sterile water + preservative)
- Vial Size: 10mL
- Form: Sterile solution
This product is intended strictly for laboratory research purposes only. It is not approved for human or veterinary use by the FDA or any other regulatory agency. Store as directed on the label and handle using appropriate laboratory and aseptic techniques.
Frequently asked questions
Yes. Every batch of Bacteriostatic Water 10ml undergoes independent third-party testing using High-Performance Liquid Chromatography (HPLC) and Mass Spectrometry (MS). The Certificate of Analysis is published and accessible from the product page.
Bacteriostatic Water 10ml sold by MHS Longevity is verified to 99%+ purity, with the result documented in each batch's Certificate of Analysis. Anything below that threshold is rejected before release.
The Certificate of Analysis for Bacteriostatic Water 10ml is available directly from the product page and on our Third-Party Test Results page. Each COA includes the batch identifier, test date, testing method, and verified purity percentage.
Bacteriostatic Water 10ml ships from our US-based facility with standard or expedited options. Orders over $150 qualify for free standard US shipping. All orders are packaged discreetly with documented handling protocols.
No. Bacteriostatic Water 10ml is supplied strictly for laboratory research purposes only. It is not approved by the FDA for human or veterinary use, and it is not intended to diagnose, treat, cure, or prevent any disease.
MHS Longevity is a veteran-owned operation focused on pharmaceutical-grade research compounds. We source from vetted manufacturers, batch-test independently with HPLC and Mass Spectrometry, and publish every Certificate of Analysis. Pricing is transparent and the testing process is documented end-to-end.
No. Both are sterile at the point of opening, but plain sterile water for injection has no bacteriostatic agent and is intended for single-use applications. Bacteriostatic Water contains 0.9% benzyl alcohol, which inhibits bacterial growth in a partially-used vial — extending its in-use shelf life and making it the practical choice for reconstituting peptides that are used across multiple research events.
For most lyophilized research peptides at typical reconstitution concentrations, 0.9% benzyl alcohol is inert and does not interfere with the peptide's chemistry or its downstream use in research. Some specific assays or unusual chemistry may benefit from sterile water for injection instead — researchers using peptides in sensitive in-vitro systems should evaluate compatibility for their specific application.
Each batch is verified against USP-grade specifications by an independent laboratory: USP <71> sterility, USP <85> bacterial endotoxin, USP <788> particulate matter, plus benzyl alcohol content and pH. The Certificate of Analysis documents test results and traceability for the specific batch.
The typical in-use shelf life cited for bacteriostatic water at 0.9% benzyl alcohol is 28 days when stored under appropriate conditions (refrigerated, sealed between accesses, accessed with aseptic technique). Marking the vial with its first-access date is good practice. After the in-use window closes, the vial should be discarded regardless of remaining volume.
Research & buying
The evidence behind Bacteriostatic Water 10ml and the questions to ask any vendor before you order.
Research details — Bacteriostatic Water 10ml
Bacteriostatic Water is not a research compound — it is the sterile reconstitution solvent that lyophilized research peptides are typically dissolved in. The product contains sterile water for injection with 0.9% benzyl alcohol added as a bacteriostatic agent, meaning the benzyl alcohol inhibits bacterial growth in the vial after it is opened and partially used. We stock it because almost every peptide product on this site requires reconstitution, and bacteriostatic water is the standard solvent for that step in modern research practice. This guide covers what bacteriostatic water is, why it is used in preference to plain sterile water, and how its quality is verified before release.
What is Bacteriostatic Water?
Bacteriostatic Water for Injection (BWFI) is sterile water meeting USP grade specifications with 0.9% benzyl alcohol (C6H5CH2OH) added as a bacteriostatic preservative. The water itself is pyrogen-free, particulate-free, and tested against USP sterility requirements at manufacture. The benzyl alcohol concentration is the standard 0.9% used by USP-grade bacteriostatic water preparations across the industry — high enough to inhibit bacterial growth in a partially-used vial, low enough that the solvent does not affect the chemical integrity of typical lyophilized peptides during reconstitution. The product is supplied as a clear, colorless solution in a 10mL vial.
Bacteriostatic Water is sold strictly for laboratory and research use. It is not approved by the FDA or any other regulatory body for human or veterinary use in this form. FDA-approved pharmaceutical-grade bacteriostatic water for injection exists under separate brand and regulatory pathways; that is an entirely distinct product produced under pharmaceutical-manufacturing standards.
Why use bacteriostatic water instead of plain sterile water?
Plain sterile water and bacteriostatic water are both sterile at the time of opening. The difference matters after the vial is first accessed: a plain-sterile-water vial loses its sterility on first access and is intended for single-use, single-day applications. The bacteriostatic agent in BWFI inhibits bacterial growth for an extended period after first access — typically 28 days at appropriate storage temperatures — making the same vial suitable for multiple reconstitution events across a research protocol. For lyophilized peptides reconstituted in sub-milliliter volumes from a 10mL vial, this is the practical reason BWFI is preferred over single-use sterile water for most peptide-reconstitution workflows.
How Bacteriostatic Water quality is verified
Quality verification for a sterile solvent is different from HPLC + MS verification of a research compound. Every batch of MHS Longevity Bacteriostatic Water is verified against USP-grade specifications:
- Sterility testing per USP <71> confirms the absence of viable bacteria, yeasts, and molds at release.
- Bacterial endotoxin testing per USP <85> confirms endotoxin levels below the specification limit, important because endotoxins can affect peptide research even in trace amounts.
- Particulate matter testing per USP <788> confirms the absence of visible and sub-visible particles above the specification thresholds.
- Benzyl alcohol content is measured and confirmed at the 0.9% specification — too low compromises bacteriostatic activity, too high could affect downstream peptide chemistry.
- pH and clarity are measured to confirm the solvent is within specification at release.
What a Bacteriostatic Water Certificate of Analysis shows
- Product name and composition. Bacteriostatic Water for Injection with 0.9% benzyl alcohol.
- Batch identifier. Unique ID linking certificate to vial lot.
- Test date. When the analysis was performed.
- USP test methods. <71> sterility, <85> bacterial endotoxin, <788> particulate matter, plus benzyl alcohol content and pH.
- Verified specifications. All USP tests passing.
- Expiration date. Sealed-vial shelf life from manufacture.
- Lab and signatures. The independent lab performing the analysis.
Storage and handling (research lab context)
Sealed Bacteriostatic Water vials are typically stored at room temperature (15–25°C) and have a multi-year sealed-vial shelf life. After the first access of a vial, the bacteriostatic effect of the benzyl alcohol provides an in-use shelf life that is commonly cited at 28 days when stored under appropriate conditions (typically refrigerated). Mark each vial with its first-access date so the in-use window can be tracked. Standard aseptic technique applies during access.
Where to buy Bacteriostatic Water 10ml
The same eight questions apply whether you're buying Bacteriostatic Water 10mlfrom us or anywhere else. Vendors who can't answer any of them are worth a closer look.
Vendor evaluation checklist
1. Is the Certificate of Analysis public and downloadable?
A vendor unwilling to publish HPLC/MS results for the batch you're buying has nothing to verify their purity claim against.
2. Which testing method was used — HPLC, Mass Spectrometry, or both?
HPLC measures purity. Mass Spectrometry confirms the molecule's identity. Reputable batches go through both.
3. What's the verified purity percentage on the published COA?
Industry research standard is 99%+. Below that, you're paying for a compound diluted with synthesis byproducts.
4. Where does the product ship from?
US-based fulfillment generally means shorter handling times, customs-free delivery, and clearer return remedies.
5. Is the price published at a single list rate, or hidden behind tier locks?
Opaque pricing is a yellow flag. Transparent vendors quote the same number to every customer.
6. What's the free-shipping threshold, if any?
Compare the all-in cost (product + shipping + handling) — not just the headline price.
7. How is the product stored prior to shipment?
Lyophilized peptides degrade with temperature swings. Vendors should disclose temperature-controlled storage.
8. Is there a documented damage-claim and return policy?
Discreet shipping carries handling risk. A clear, written policy protects you when something goes wrong.
MHS LongevityThis site - Price
- $10
- Purity
- 99%+
- Testing
- HPLC + MS
- COA public
- US-based
- Free shipping
- $150+
- Last checked
- May 13, 2026
| Vendor | Price | Listed purity | Testing method | COA public | US-based | Free shipping | Last checked |
|---|---|---|---|---|---|---|---|
MHS LongevityThis site | $10 | 99%+ | HPLC + MS | $150+ | May 13, 2026 |
Competitor data sourced from each vendor's public product page on the date shown. Listed purity reflects each vendor's own published claim; Certificate of Analysis availability is verified at the URL above. Data may have changed since last check.