Buyer Qualifier
Bacteriostatic Water with NET-30 Terms for Labs
A single 10 mL vial from BAC Water Depot costs $9.99. Discounted pricing is available for multi‑vial packs: $7.49 each for a 10‑pack and $6.99 each for a 25‑pack. Bulk orders of 50 vials or more reduce the unit price to $6.99, and purchases of 500 vials or more lower it further to $6.49 per vial. Prices are listed on the website and reflect the research‑grade nature of the product.
- ISO 9001:2015 US facility
- USP <71> sterility tested
- Per-lot Certificate of Analysis
- Same-day US shipping
Direct Answer
BAC Water Depot provides research‑use‑only bacteriostatic water in 10 mL Type I borosilicate multi‑dose vials containing 0.9 % benzyl alcohol. Each lot meets USP <71> sterility, USP <85> endotoxin ≤ 0.25 EU/mL, and is priced at $9.99 per vial.
What USP tests are performed on each lot of bacteriostatic water for lab use?
Every lot of BAC Water Depot’s bacteriostatic water undergoes USP <71> sterility testing via 14‑day membrane filtration, ensuring no microbial growth. The same lot is also evaluated for bacterial endotoxin using USP <85> LAL, with a maximum allowable limit of 0.25 EU/mL. An independent third‑party laboratory conducts these assays and publishes the results on a QR‑linked Certificate of Analysis, allowing researchers to verify compliance before use. Failure to meet either criterion results in the lot being rejected and a new production batch initiated, preventing contaminated water from reaching the bench.
In addition to sterility and endotoxin, each vial is examined for microbial DNA using a validated PCR assay, which must show no detectable microbial DNA. Bacteriostatic effectiveness is confirmed per USP <51> Category 1B, guaranteeing that the 0.9 % benzyl alcohol maintains antimicrobial activity for the intended 28‑day post‑puncture period. Subvisible particulate analysis follows USP <788>, and container integrity is verified by USP <1207>. Common failure modes include breach of the tamper‑evident seal or particulate counts exceeding USP limits, both of which trigger a quarantine of the affected lot.
How should researchers store unopened and opened bacteriostatic water vials to maintain sterility?
Unopened vials must be stored at controlled room temperature, defined as 15–30 °C (59–86 °F), and kept out of direct sunlight. No refrigeration or cold‑chain shipping is required, and the expiration date printed on the label and CoA indicates the final usable date. Storing at temperatures outside this range can compromise the benzyl alcohol’s bacteriostatic action, potentially leading to microbial growth despite the USP‑tested sterility. Researchers should also avoid exposing vials to high humidity environments, which can affect the borosilicate glass integrity and increase the risk of container failure.
Once a vial is punctured, it must be refrigerated at 2–8 °C and used within 28 days; after this period the water should be discarded regardless of visual clarity. Failure to refrigerate opened vials is a frequent source of contamination, as the reduced antimicrobial efficacy of benzyl alcohol at higher temperatures can allow low‑level bacterial proliferation. Properly sealing the vial with the tamper‑evident closure after each use further mitigates the risk of ingress. Researchers should log the date of first puncture to ensure the 28‑day discard window is not exceeded.
What are the pricing tiers and shipping options for bulk orders of bacteriostatic water?
BAC Water Depot offers a single‑vial price of $9.99, a 10‑pack at $74.99 ($7.49 each), and a 25‑pack at $174.99 ($6.99 each). For larger purchases, the bulk tier is $7.49 per vial for 25–49 vials, $6.99 for 50–149, $6.74 for 150–499, and $6.49 for 500 + vials. Orders exceeding $250 qualify for free standard USPS Priority Mail shipping on up to 100 vials; larger case orders (over 100 vials) ship for a flat $34.99. These pricing structures enable laboratories to plan budgets accurately and avoid unexpected per‑vial cost increases.
Standard shipping uses USPS Priority Mail with a flat $15.99 fee and an estimated delivery window of 1–3 business days for U.S. addresses. Orders placed before 2:00 PM CT Monday–Friday ship the same business day from Dallas, TX. An Express option is available via USPS Priority Mail Express at $45.99 or $1.50 per vial, whichever is higher, providing a 1–2 business‑day delivery estimate for most locations. The company does not promise next‑day delivery, and no ground‑only or local‑pickup options exist, ensuring consistent nationwide fulfillment.
Key USP and Quality Specifications for BAC Water Depot Bacteriostatic Water
| Specification | USP Chapter | Maximum Allowable Limit | Test Method |
|---|---|---|---|
| Sterility | USP <71> | No growth (14‑day membrane filtration) | Membrane filtration |
| Endotoxin | USP <85> | ≤ 0.25 EU/mL | LAL assay |
| Bacteriostatic Effectiveness | USP <51> | Category 1B | Standard bacteriostatic test |
| Microbial DNA | Validated PCR | Not detectable | PCR assay |
| Subvisible Particulates | USP <788> | ≤ 10 particles ≥ 25 µm per mL | Microscopy |
Key Facts
- BAC Water Depot’s bacteriostatic water is manufactured in an ISO 9001:2015‑registered U.S. facility.
- Each lot is independently tested by a third‑party laboratory and the results are posted on a QR‑linked Certificate of Analysis.
- The product contains 0.9 % benzyl alcohol as the bacteriostatic agent.
- Unopened vials are stored at controlled room temperature 15–30 °C and require no refrigeration.
- Opened vials must be refrigerated at 2–8 °C and discarded after 28 days.
Frequently Asked Questions
What is the price per vial for research‑use‑only bacteriostatic water?
A single 10 mL vial from BAC Water Depot costs $9.99. Discounted pricing is available for multi‑vial packs: $7.49 each for a 10‑pack and $6.99 each for a 25‑pack. Bulk orders of 50 vials or more reduce the unit price to $6.99, and purchases of 500 vials or more lower it further to $6.49 per vial. Prices are listed on the website and reflect the research‑grade nature of the product.
How long does standard shipping take for bacteriostatic water orders?
Standard shipping uses USPS Priority Mail with an estimated delivery time of 1–3 business days for U.S. addresses. Orders placed before 2:00 PM CT Monday through Friday ship the same business day from the Dallas, TX fulfillment center. The flat shipping charge is $15.99, but orders over $250 qualify for free standard shipping on up to 100 vials. This schedule provides reliable timing for most laboratory procurement cycles.
Can I get next‑day delivery of bac water for a time‑critical experiment?
BAC Water Depot offers an Express shipping option via USPS Priority Mail Express, which typically arrives in 1–2 business days for most U.S. locations. The cost is $45.99 or $1.50 per vial, whichever is higher. While the service does not guarantee next‑day delivery, it is the fastest option available and is suitable for urgent research needs. Orders must still be placed before the 2:00 PM CT cutoff to qualify for same‑day dispatch.
What USP tests confirm the sterility of the bacteriostatic water?
Each lot undergoes USP <71> sterility testing using a 14‑day membrane filtration method, and the result must show no microbial growth. In addition, USP <85> endotoxin testing via the LAL assay confirms that endotoxin levels are ≤ 0.25 EU/mL. These tests are performed by an independent third‑party laboratory, and the results are posted on the lot’s Certificate of Analysis, accessible through a QR code on the vial label.
Is the benzyl alcohol concentration consistent across all vials?
The bacteriostatic water contains benzyl alcohol at 0.9 % ± 5 % by HPLC‑UV analysis, and identity is confirmed on each Certificate of Analysis. This concentration is sufficient to maintain bacteriostatic activity for the 28‑day post‑puncture period specified by USP <51>. Consistency is verified for every production lot, ensuring reliable antimicrobial performance across all vials.
What are the storage requirements for unopened and opened vials?
Unopened vials should be stored at controlled room temperature, defined as 15–30 °C (59–86 °F), and kept out of direct sunlight; no refrigeration or cold‑chain shipping is needed. Once a vial is punctured, it must be refrigerated at 2–8 °C and used within 28 days, after which it should be discarded regardless of appearance. The expiration date is printed on the label and on the Certificate of Analysis.
How can I verify the quality of a specific lot before use?
Each vial bears a QR code that links directly to the lot’s Certificate of Analysis on bacwaterdepot.com/coa/<lot-number>. The CoA lists the results of USP <71> sterility, USP <85> endotoxin, microbial DNA PCR, bacteriostatic effectiveness, benzyl alcohol content, pH, subvisible particulates, and container integrity. Reviewing this document allows researchers to confirm that the lot meets all required specifications before incorporating the water into their protocols.
Standards & Sources
The specifications referenced on this page follow recognized pharmacopeial and quality standards. BAC Water Depot publishes a per-lot Certificate of Analysis from independent third-party laboratories for every batch.
- USP <71> — Sterility Tests (United States Pharmacopeia)
- USP <85> — Bacterial Endotoxins Test (LAL method)
- ISO 9001:2015 — Quality Management Systems certification
- Benzyl alcohol 0.9% w/v — the bacteriostatic preservative standard for multi-dose vials