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BAC Water 10ml
BAC Water 10ml (Bacteriostatic Water) is a sterile, preservative-containing solution designed for reconstituting peptides safely and efficiently. Formulated with a small amount of benzyl alcohol, it helps inhibit bacterial growth and supports multi-use applications. This makes it an essential companion product for maintaining peptide stability after mixing, ensuring a more controlled and reliable research or wellness experience.
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Product Information
BAC Water 10ml is a sterile solution enhanced with 0.9% benzyl alcohol, which acts as a bacteriostatic agent to help prevent the growth of harmful microorganisms. This added protection allows the solution to be used multiple times from the same vial, unlike standard sterile water that is typically intended for single use only.
It plays an important role in peptide preparation by helping maintain the integrity and stability of compounds after reconstitution. By reducing contamination risk, BAC Water supports more consistent handling and storage of peptide solutions over time.
Commonly used in peptide research and wellness protocols, it provides a practical and reliable option for preparing compounds for subcutaneous or intramuscular applications. When stored correctly, usually under refrigeration, it can help preserve solution usability for an extended period, making it both efficient and cost-effective.

| BAC Water 10ml — Technical Specifications | |
| Specification | Value |
| Product Name: | BAC Water 10ml |
| Compound Type: | Reconstitution vehicle, bacteriostatic water |
| CAS Number: | 7732-18-5 (water); 100-51-6 (benzyl alcohol) |
| PubChem CID: | 962 (water) |
| Molecular Formula: | H2O + 0.9% benzyl alcohol (C7H8O) |
| Molecular Weight (g/mol): | 18.02 (water) |
| Synonyms / Other Names: | Bacteriostatic Water for Injection, BAC Water, Sterile Water + Benzyl Alcohol |
| Appearance: | Clear, colourless sterile solution |
| Purity: | Research grade / USP-compatible |
| Solubility: | Miscible with water; aqueous reconstitution vehicle |
| Storage (Sealed): | Refrigerate 2–8 °C; use within 28 days of first opening |
| Storage (After Reconstitution): | Refrigerate 2–8 °C; multi-dose; discard after 28 days |
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Key Benefits
What You Get
BAC Water is an essential component in peptide handling, offering a balance of safety, convenience, and stability. Its formulation is specifically designed to support multi-dose use while helping maintain the quality of reconstituted compounds over time.

Enhanced Solution Stability
Helps maintain the consistency and integrity of peptides after reconstitution, supporting more reliable outcomes when storing and using prepared solutions over time.
Multi-Use Convenience
The inclusion of benzyl alcohol allows multiple withdrawals from the same vial, reducing waste and making it more practical for ongoing peptide use or research applications.
Reduced Contamination Risk
The bacteriostatic properties help minimize microbial growth, providing an added layer of safety during handling and repeated use.
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Common Questions
Frequently Asked Questions
What is BAC Water and why is it used for peptide reconstitution? +
Bacteriostatic Water (BAC Water) is sterile water containing 0.9% benzyl alcohol, which inhibits bacterial growth. This preservative allows multiple withdrawals from the same vial without contamination risk, making it the standard choice for reconstituting lyophilized research peptides.
How much BAC water should I use for a 10mg peptide vial? +
The most common approach is 1–3 mL per 10mg vial. Using 2 mL gives a concentration of 5 mg/mL (5,000 mcg/mL). The exact amount depends on your target concentration and desired dose per injection. Use the reconstitution calculator on each product page for precise syringe units.
Can I use this 10ml vial to reconstitute multiple peptide vials? +
Yes, the 10ml vial is designed for multi-dose use. With 0.9% benzyl alcohol as a preservative, it remains sterile across multiple withdrawals when handled correctly — always sanitize the stopper with an alcohol swab before each draw.
How long does BAC Water remain usable after first opening? +
Once opened, refrigerate at 2–8 °C and use within 28 days. Discard after 28 days regardless of remaining volume. Do not freeze after opening as this can crack the vial and compromise sterility.
Is BAC Water the same as sterile water or saline? +
No, sterile water contains no preservative and is intended for single use only. Saline contains 0.9% sodium chloride. BAC Water contains 0.9% benzyl alcohol specifically to allow safe multi-dose use. For peptide reconstitution, BAC Water is strongly preferred over plain sterile water.






