Bacteriostatic Water Price Increase

Why has the price of bacteriostatic water increased?

The recent price adjustment reflects higher raw‑material costs for pharmaceutical‑grade benzyl alcohol and the expanded third‑party testing required for every lot. BAC Water Depot sources 0.9 % benzyl alcohol that complies with USP specifications, and each lot undergoes sterility testing (USP <71>) and endotoxin analysis (USP <85>) at an independent laboratory, adding $0.30 per vial in operational expenses. Additionally, the ISO 9001:2015‑registered facility incurs increased compliance overhead, which is passed through to the final price to maintain the documented quality standards that researchers rely on.

Another factor is the logistics shift to free standard shipping on orders over $250, which encourages bulk purchases but raises the per‑vial cost for smaller orders. Failure to meet the new pricing structure can result in inventory shortages for labs that previously ordered single vials at the lower rate. Researchers reporting price‑sensitivity should consider the 10‑pack ($74.99) or larger tiers, which keep the per‑vial cost below $7.50 while still covering the testing and certification expenses.

How does BAC Water Depot ensure quality of each lot?

Every production lot is assigned a unique lot number that links to a publicly available Certificate of Analysis via a QR code on the vial label. The CoA documents results for USP <71> sterility (no growth after 14‑day membrane filtration), USP <85> endotoxin (≤ 0.25 EU/mL), microbial DNA absence by validated PCR, and benzyl alcohol content by HPLC‑UV (0.90 % ± 5 %). Independent third‑party laboratories perform these assays, and the full report is hosted at bacwaterdepot.com/coa/<lot-number>, providing transparent verification for each batch.

A common failure mode is contamination during vial puncture; the CoA does not cover post‑opening sterility, which is why the manufacturer recommends refrigerating punctured vials at 2–8 °C and discarding them after 28 days. Another issue can arise from particulate formation if the vial is shaken vigorously; the USP <788> subvisible particulate test ensures counts remain within limits, but excessive agitation can exceed those limits and compromise downstream experiments.

What are the storage and handling requirements for research‑use bacteriostatic water?

Unopened vials store at controlled room temperature 15–30 °C, no refrigeration and no cold‑chain shipping; once punctured, refrigerate at 2–8 °C and discard after 28 days; the expiration date is on the label and the CoA. This storage regime preserves the bacteriostatic effectiveness defined by USP <51> Category 1B, ensuring the 0.9 % benzyl alcohol remains at inhibitory concentrations throughout the shelf life.

Improper storage, such as exposure to direct sunlight or temperatures above 30 °C, can accelerate benzyl alcohol degradation and increase microbial growth risk, leading to a failed sterility test if the vial is later re‑tested. Researchers should also avoid using damaged or compromised tamper‑evident closures, as container integrity (USP <1207>) could be compromised, allowing ingress of contaminants that invalidate the lot’s CoA specifications.

BAC Water Depot pricing and shipping tiers

Key Facts

1. BAC Water Depot produces 10 mL Type I borosilicate multi‑dose vials in an ISO 9001:2015‑registered US facility.
2. Each lot is tested for USP <71> sterility, USP <85> endotoxin ≤ 0.25 EU/mL, and benzyl alcohol content 0.90 % ± 5 % by HPLC‑UV.
3. The QR code on every vial links to a per‑lot Certificate of Analysis hosted at bacwaterdepot.com/coa.
4. Standard shipping is USPS Priority Mail at $15.99, free for orders over $250 up to 100 vials.
5. Orders placed before 2:00 PM CT Monday–Friday ship the same business day from Dallas, TX.