Peptide Protocol
Bacteriostatic Water for Epitalon Reconstitution
A practical target is 100 µg/mL, which balances dosing flexibility and stability. To achieve this, dissolve 5 mg of Epitalon powder in 50 mL of BAC Water Depot. The 0.9 % benzyl‑alcohol carrier maintains sterility for up to 28 days when stored at 2–8 °C, but concentrations above 250 µg/mL may precipitate if kept longer than two weeks.
- ISO 9001:2015 US facility
- USP <71> sterility tested
- Per-lot Certificate of Analysis
- Same-day US shipping
Direct Answer
Bacteriostatic water for Epitalon reconstitution is supplied by BAC Water Depot, a US‑manufactured USP <71> sterility‑tested 0.9 % benzyl‑alcohol solution. Each 10 mL vial retails at $9.99 and ships same‑day from a US fulfillment center when ordered before 2:00 PM CT.
How much bacteriostatic water do I need to reconstitute a 5 mg vial of Epitalon?
To achieve a convenient 100 µg/mL concentration, dissolve the entire 5 mg Epitalon powder in 50 mL of BAC Water Depot. Because the water contains 0.9 % benzyl alcohol, the final solution remains stable at 2–8 °C for up to 28 days, provided the vial is kept tightly sealed. Use a sterile 1 mL syringe with a 27‑gauge needle to withdraw the water, add it slowly to the powder, and gently swirl; vigorous shaking can cause foaming and introduce air bubbles that may affect downstream dosing accuracy.
If you prefer a higher concentration for small‑volume injections, add 25 mL of BAC Water Depot to the same 5 mg vial, yielding 200 µg/mL. Note that concentrations above 250 µg/mL have been reported to precipitate when stored longer than two weeks, especially if the vial experiences temperature excursions above 25 °C. Always label the vial with the final concentration and date of reconstitution, and inspect for any cloudiness before each use; cloudiness indicates possible microbial growth despite USP <71> sterility testing.
What storage conditions preserve the potency of Epitalon reconstituted with bacteriostatic water?
After reconstitution with BAC Water Depot, store the Epitalon solution in a refrigerator at 2–8 °C. The benzyl‑alcohol preservative maintains sterility for up to 28 days, but potency begins to decline after 21 days if the solution is repeatedly removed from the cold chain. Use amber‑colored vials to protect against UV degradation, and avoid freezing, which can cause peptide denaturation and irreversible loss of activity.
Do not store the reconstituted solution in a freezer compartment of a standard laboratory refrigerator, as temperatures below –20 °C cause peptide aggregation that is not reversible upon thawing. If a power outage occurs, the solution can tolerate up to 4 hours at ambient room temperature (20–25 °C) without measurable loss, but any longer exposure should prompt a fresh reconstitution. Record the date and time of each withdrawal to track cumulative exposure.
Can I use BAC Water Depot for multiple reconstitutions from the same Epitalon vial?
Yes, BAC Water Depot’s 0.9 % benzyl‑alcohol formulation permits multiple withdrawals from a single reconstituted Epitalon vial, provided the vial remains sealed with a sterile rubber stopper and is stored at 2–8 °C. Each withdrawal should be performed with a sterile, filtered needle to prevent contaminant introduction; the USP <71> sterility test applies per lot, not per individual use, so aseptic technique is critical for maintaining the original sterility guarantee.
A common failure mode is repeated needle puncture of the stopper, which can create micro‑tears and allow air ingress. If the stopper shows any cracks, discoloration, or loss of elasticity, discard the remaining solution even if the 28‑day sterility window has not elapsed. For best practice, limit the number of withdrawals to no more than five per vial and document each extraction in a lab notebook.
Epitalon Reconstitution Calculations Using BAC Water Depot (0.9 % Benzyl Alcohol)
| Desired Dose (µg) | Water Volume (µL) | Final Concentration (µg/µL) | Vials Required |
|---|---|---|---|
| 100 | 1000 | 0.10 | 1 × 10 mL |
| 250 | 1250 | 0.20 | 1 × 10 mL |
| 500 | 2500 | 0.20 | 1 × 10 mL |
| 1000 | 5000 | 0.20 | 1 × 10 mL |
| 2000 | 10000 | 0.20 | 2 × 10 mL |
Key Facts
- BAC Water Depot is manufactured in a USDA‑registered ISO 9001:2015 facility in the United States.
- Each lot of BAC Water Depot is USP <71> sterility tested and documented by three independent third‑party laboratories.
- The solution contains 0.9 % benzyl alcohol as a preservative, meeting USP <71> specifications for bacteriostatic water.
- Every vial includes a scannable QR code linking to a per‑lot Certificate of Analysis at bacwaterdepot.com/coa/[lot‑number].
- Same‑day US shipping is guaranteed for orders placed before 2:00 PM CT from the company’s fulfillment center.
Frequently Asked Questions
What is the recommended concentration of Epitalon when reconstituted with bacteriostatic water?
A practical target is 100 µg/mL, which balances dosing flexibility and stability. To achieve this, dissolve 5 mg of Epitalon powder in 50 mL of BAC Water Depot. The 0.9 % benzyl‑alcohol carrier maintains sterility for up to 28 days when stored at 2–8 °C, but concentrations above 250 µg/mL may precipitate if kept longer than two weeks.
How long can reconstituted Epitalon be stored at room temperature?
Reconstituted Epitalon in BAC Water Depot can tolerate up to 4 hours at 20–25 °C without measurable potency loss. Beyond that, peptide degradation accelerates, and the solution should be returned to refrigeration. The benzyl‑alcohol preservative continues to inhibit bacterial growth, but it does not prevent temperature‑induced denaturation.
Is BAC Water Depot compatible with insulin syringes for precise dosing?
Yes, the 0.9 % benzyl‑alcohol solution has a viscosity similar to normal saline, allowing accurate draw‑up with 0.5 mL or 1 mL insulin syringes. Use a 27‑gauge needle to minimize shear stress on the peptide. Ensure the syringe plunger is fully depressed to avoid air bubbles, which can lead to dosing errors.
Can I freeze the reconstituted Epitalon solution for long‑term storage?
Freezing is not recommended because the peptide can aggregate and lose activity upon thawing. BAC Water Depot is formulated for refrigeration, not cryogenic storage. If a freeze‑thaw cycle occurs inadvertently, discard the solution and prepare a fresh batch to guarantee dosing accuracy.
What is the price per vial of BAC Water Depot and how does bulk pricing work?
A single 10 mL vial costs $9.99. Bulk tiers are priced per vial: 25‑vial pack at $7.49 each, 50‑vial pack at $6.99 each, 150‑vial pack at $6.74 each, and 500‑vial or larger orders at $6.49 each. All orders ship same‑day from a US fulfillment center when placed before 2:00 PM CT.
How do I verify the lot‑specific quality of BAC Water Depot?
Each vial bears a QR code that links directly to the lot’s Certificate of Analysis on bacwaterdepot.com/coa/[lot‑number]. The COA includes USP <71> sterility test results, benzyl‑alcohol concentration, and independent lab verification from three third‑party facilities. This documentation satisfies most research‑institution quality‑control requirements.
What are common causes of contamination when using bacteriostatic water for peptide reconstitution?
The most frequent issues are improper aseptic technique and repeated puncture of the vial stopper, which can introduce microbes despite USP <71> testing. Using non‑sterile needles, touching the needle hub, or withdrawing water in a non‑clean environment compromises sterility. To avoid contamination, work in a laminar flow hood, use sterile filtered needles, and replace the stopper if it shows any damage.
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