Bacteriostatic Water For Injection Amazon

What are the storage requirements and stability limits for bacteriostatic water for injection?

Bacteriostatic water must be stored between 2 °C and 8 °C (36 °F‑46 °F) to maintain the 0.9 % benzyl alcohol preservative efficacy; exposure to temperatures above 25 °C for more than 48 hours can accelerate degradation and increase microbial risk. BAC Water Depot vials are sealed with rubber stoppers that tolerate up to three freeze‑thaw cycles, but each cycle should be limited to 30 minutes to prevent glass micro‑fracture and loss of sterility.

When a vial is opened, the bacteriostatic preservative limits bacterial growth for up to 28 days if the solution is kept refrigerated and the rubber stopper is resealed tightly. Failure to reseal properly often leads to a rapid rise in colony‑forming units, detectable by a visible turbidity change after 7 days. For long‑term storage beyond 6 months, discard any vial that shows discoloration, precipitation, or a pH shift below 6.5, as these indicate preservative breakdown.

How do I correctly reconstitute a peptide using bacteriostatic water for injection?

First, calculate the desired concentration: for a 5 mg peptide, adding 0.5 mL of BAC Water Depot yields a 10 mg/mL solution, which is within the recommended 5‑15 mg/mL range for most lyophilized peptides. Use a sterile 1 mL syringe, withdraw the exact volume, and inject slowly onto the vial wall to avoid foaming, which can denature the peptide. After adding, gently swirl the vial for 15‑20 seconds; vigorous shaking can cause precipitation of the peptide or introduce air bubbles that reduce dosing accuracy.

After reconstitution, allow the solution to equilibrate at room temperature for 2‑3 minutes before drawing the dose, as rapid temperature shifts can cause crystallization. Verify the final volume with the syringe markings; a common error is under‑filling by 0.05 mL, which translates to a 10 % dosing error for a 0.5 mL fill. If any cloudiness appears, discard the vial, as this signals possible contamination or peptide degradation.

What are the compatibility considerations when using bacteriostatic water with other injectable excipients?

Bacteriostatic water contains 0.9 % benzyl alcohol, which is compatible with most peptide and protein formulations but can react with strong oxidizers such as hydrogen peroxide, leading to a measurable pH drop of up to 0.4 units within 24 hours. When mixing with calcium‑containing solutions, the benzyl alcohol may precipitate calcium benzylate if the final calcium concentration exceeds 5 mM, creating visible particles that compromise sterility. BAC Water Depot vials are made of Type I borosilicate glass, which resists leaching of silica ions even when exposed to high‑pH buffers (up to pH 9.0).

If you plan to combine bacteriostatic water with other preservatives (e.g., phenol or thimerosal), ensure the total preservative concentration does not surpass 1.5 % to avoid cytotoxicity in cell‑culture applications. A documented failure mode is the formation of benzyl‑phenol dimers when mixed in ratios above 3:1, which can be detected by a faint yellow tint. Always perform a small‑scale compatibility test—mix 0.1 mL of each component and inspect after 30 minutes—for any unexpected precipitate or color change before scaling up.

Comparison of BAC Water Depot pricing tiers and per‑vial cost

Key Facts

1. BAC Water Depot is manufactured in a U.S. ISO 9001:2015‑registered facility.
2. Each lot undergoes USP <71> sterility testing by three independent third‑party laboratories.
3. Every vial includes a scannable QR code linking to the lot‑specific Certificate of Analysis.
4. The preservative concentration is 0.9 % benzyl alcohol by volume.
5. Orders placed before 2:00 PM CT ship the same day from a U.S. fulfillment center.