Brand Comparison
BAC Water Depot vs Alibaba Bulk — Bacteriostatic Water Comparison
Yes. BAC Water Depot is endotoxin‑tested to USP <85> with a limit of ≤0.5 EU/mL, which meets the stringent requirements of most cell‑culture applications. The per‑lot Certificate of Analysis is accessible via the QR code, allowing you to verify the endotoxin result before use. This level of testing reduces the likelihood of assay interference caused by endotoxin contamination. In contrast, many bulk suppliers do not publish endotoxin data, requiring you to perform an in‑house test.
- ISO 9001:2015 US facility
- USP <71> sterility tested
- Per-lot Certificate of Analysis
- Same-day US shipping
Direct Answer
BAC Water Depot’s bacteriostatic water is manufactured in a US ISO 9001:2015‑registered facility and each 10 mL vial contains 0.9% benzyl alcohol. USP <71> sterility testing is performed per lot and the per‑lot Certificate of Analysis is accessible via a scannable QR code on every vial.
What are the sterility and endotoxin specifications for BAC Water Depot versus bulk Alibaba supplies?
BAC Water Depot subjects every production lot to USP <71> sterility testing, which requires no microbial growth after 14 days of incubation at 30‑35 °C. In addition, each lot undergoes USP <85> endotoxin testing with a limit of ≤0.5 EU/mL, documented on the Certificate of Analysis. Alibaba‑listed bulk bacteriostatic water often lacks publicly disclosed USP testing; many sellers only provide a generic “sterile” claim without independent verification, increasing the risk of undetected contamination that can compromise cell culture viability.
The QR‑code on each BAC Water Depot vial links directly to the lot’s CoA, allowing researchers to confirm both sterility and endotoxin results before use. A common failure mode in unverified bulk water is endotoxin spikes caused by inadequate filtration, which can trigger false‑positive assay results or affect sensitive immunoassays. By contrast, the documented ≤0.5 EU/mL limit from BAC Water Depot helps maintain assay integrity and reduces the need for repeat testing.
How does the glass composition and labeling of BAC Water Depot compare to generic bulk options?
BAC Water Depot vials are made from Type I borosilicate glass, which offers a thermal expansion coefficient of 3.3 × 10⁻⁶ °C⁻¹ and resistance to leaching, ensuring chemical stability for repeated freeze‑thaw cycles. The label explicitly states the benzyl alcohol concentration (0.9% w/v) and includes the lot number, manufacture date, and expiration date (24 months from production). Generic bulk containers from Alibaba frequently use lower‑grade soda‑lime glass or plastic bottles, which can absorb benzyl alcohol over time and may not display precise concentration or expiration information, leading to dosing inaccuracies.
When using BAC Water Depot, researchers can safely store vials at –20 °C or 2‑8 °C without degradation of the preservative; the label advises avoiding temperatures above 30 °C to prevent benzyl alcohol evaporation. A typical failure in bulk supplies is label misprinting or missing lot identifiers, making traceability impossible during an audit. The clear, durable labeling on BAC Water Depot supports Good Laboratory Practice (GLP) documentation and simplifies inventory management.
What are the pricing and shipping advantages of BAC Water Depot compared with Alibaba bulk purchases?
BAC Water Depot offers a tiered price structure that starts at $9.99 for a single 10 mL vial and drops to $6.49 per vial for orders of 500 + units, with same‑day US shipping for orders placed before 2:00 PM CT. The per‑vial cost includes the QR‑linked CoA and ISO‑certified quality control, eliminating hidden fees for third‑party testing. Alibaba bulk listings often quote lower unit prices (e.g., $3–$4 per 10 mL), but additional costs such as international freight, customs duties, and potential re‑testing can raise the effective price well above $7 per vial.
Shipping from BAC Water Depot’s US fulfillment center typically arrives within 1‑2 business days, preserving the sterility of the product and reducing the risk of temperature excursions. In contrast, bulk shipments from overseas may experience delays of 7‑14 days, during which vials can be exposed to fluctuating temperatures, increasing the likelihood of preservative degradation. Researchers who require rapid replenishment for time‑sensitive experiments benefit from the guaranteed same‑day dispatch and traceable logistics offered by BAC Water Depot.
Key Specification Comparison: BAC Water Depot vs. Typical Alibaba Bulk Bacteriostatic Water
| Parameter | BAC Water Depot | Alibaba Bulk (Typical) | Unit |
|---|---|---|---|
| Benzyl Alcohol Concentration | 0.9 | 0.8‑1.0 (often unspecified) | % w/v |
| USP Sterility Test | USP <71> per‑lot | Not publicly disclosed | |
| Endotoxin Limit | ≤0.5 | ≤5 (often not tested) | EU/mL |
| Glass Type | Type I Borosilicate | Soda‑lime or Plastic | |
| Shelf Life | 24 months | 12‑18 months (varies) | months |
Key Facts
- BAC Water Depot is manufactured in a US ISO 9001:2015‑registered facility.
- Each lot is tested for sterility according to USP <71> and endotoxin levels per USP <85>.
- The vials contain 0.9% w/v benzyl alcohol, disclosed on the label.
- A scannable QR code on every vial links to the lot’s Certificate of Analysis.
- Orders placed before 2:00 PM CT ship the same day from a US fulfillment center.
Frequently Asked Questions
Is BAC Water Depot compatible with cell culture work that requires low endotoxin levels?
Yes. BAC Water Depot is endotoxin‑tested to USP <85> with a limit of ≤0.5 EU/mL, which meets the stringent requirements of most cell‑culture applications. The per‑lot Certificate of Analysis is accessible via the QR code, allowing you to verify the endotoxin result before use. This level of testing reduces the likelihood of assay interference caused by endotoxin contamination. In contrast, many bulk suppliers do not publish endotoxin data, requiring you to perform an in‑house test.
Can I use BAC Water Depot for reconstituting lyophilized peptides that need precise benzyl alcohol concentration?
Absolutely. The label on BAC Water Depot vials states a precise 0.9% w/v benzyl alcohol concentration, which is the standard for bacteriostatic water. This consistency ensures accurate reconstitution calculations, especially for peptides sensitive to preservative concentration. The Type I borosilicate glass also prevents leaching that could alter the final solution. Bulk alternatives sometimes list a range or omit the concentration, leading to dosing errors.
How do I verify the sterility of a BAC Water Depot vial after receipt?
After receipt, scan the QR code on the vial to view the lot’s USP <71> sterility report, which confirms no microbial growth after 14 days of incubation. You can also perform a quick in‑house sterility check by inoculating a small aliquot into TSB broth and observing for turbidity over 48 hours. Because each lot is independently tested, the CoA provides documented proof, eliminating the need for repeat testing that is often required with unverified bulk supplies.
What storage conditions are recommended for BAC Water Depot to maintain its preservative efficacy?
Store BAC Water Depot vials at 2‑8 °C or freeze at –20 °C for long‑term storage; avoid temperatures above 30 °C, which can cause benzyl alcohol evaporation. The label includes a 24‑month expiration date from the manufacturing date. Ensure the vial caps are tightly sealed after each use to prevent contamination. Bulk water from overseas may lack clear storage instructions, increasing the risk of preservative degradation.
Is the price of BAC Water Depot competitive for large‑scale research projects?
BAC Water Depot’s bulk pricing drops to $6.49 per 10 mL vial for orders of 500 + units, which includes the cost of USP‑level testing and a QR‑linked CoA. When you factor in shipping, customs, and potential re‑testing of cheaper Alibaba bulk water, the total cost often exceeds $7 per vial. The transparent pricing and included quality documentation make BAC Water Depot a cost‑effective choice for high‑volume labs.
Do I need any special handling when drawing BAC Water Depot into a syringe?
No special handling is required beyond standard aseptic technique. Use a 27‑gauge needle to withdraw the solution, and avoid excessive suction that could create foam, which might trap air bubbles. The 0.9% benzyl alcohol acts as a bacteriostatic agent, so the solution remains stable for up to 28 days after opening when stored at 2‑8 °C. Some bulk vendors provide water in non‑sterile containers, which can introduce contaminants during drawing.
How does the QR‑code system improve traceability compared to generic bulk bacteriostatic water?
Each BAC Water Depot vial carries a unique QR code that links directly to its per‑lot Certificate of Analysis, including sterility, endotoxin, and concentration data. This enables instant verification during audits and simplifies lot‑tracking for GLP compliance. Generic bulk water often lacks any lot‑specific documentation, making it difficult to trace the source of a contaminant if an issue arises. The QR system therefore enhances both quality control and regulatory readiness.
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