What Is Bacteriostatic Water (BAC Water)?
Category: Supplies
Sterile water containing 0.9% benzyl alcohol as a preservative. Used to reconstitute peptides because it inhibits bacterial growth, extending the shelf life of mixed peptides to 3-4 weeks.
Detailed Explanation
Bacteriostatic water is a specially prepared form of sterile water that contains 0.9% benzyl alcohol as a bacteriostatic agent. This preservative prevents the growth and reproduction of bacteria, making it safe to use for multiple withdrawals from the same vial over an extended period. Unlike plain sterile water, which should be discarded after a single use, bacteriostatic water maintains its sterility for up to 28 days after the vial is first pierced.
Practical Context
Always use bacteriostatic water (not regular sterile water or saline) when reconstituting peptides. Regular sterile water lacks preservatives and can allow bacterial growth within 24 hours of opening, creating a contamination risk. Bacteriostatic water is available from pharmacies and online suppliers in 10mL or 30mL vials. Store it at room temperature and check the expiration date before use.
Frequently Asked Questions
Can I use regular sterile water instead of bacteriostatic water?
While technically possible, it is not recommended. Sterile water has no preservative, so the reconstituted peptide must be used within 24 hours and is at higher risk of bacterial contamination.
How long does bacteriostatic water last once opened?
Bacteriostatic water is good for up to 28 days after the vial is first pierced, thanks to the benzyl alcohol preservative. Always use a new sterile needle when drawing from it.
How much bacteriostatic water should I add to my peptide vial?
The amount depends on the peptide and vial size. Use a reconstitution calculator to determine the optimal volume. More water means a lower concentration, which can make measuring small doses easier.
Related Peptides
- BPC-157 - A pentadecapeptide derived from human gastric juice, known for tissue healing properties. (Dosage | Calculator)
- TB-500 - A synthetic peptide of the naturally occurring thymosin beta-4, promotes healing and reduces inflammation. (Dosage | Calculator)
- Ipamorelin - A selective GH secretagogue with minimal effect on cortisol or prolactin. (Dosage | Calculator)
Related Terms
- Reconstitution - The process of adding bacteriostatic water to lyophilized peptide powder to create an injectable solution. Always inject water slowly along the vial wall - never spray directly on the powder.
- Lyophilized (Freeze-Dried) - The powder form of peptides as they arrive from the manufacturer. Lyophilized peptides are stable for extended storage and must be reconstituted with bacteriostatic water before use.
- Concentration - The amount of peptide dissolved per unit of liquid, typically expressed as mcg per unit or mg per ml. Calculated by dividing the total peptide amount by the volume of water added.
- Insulin Syringe - A syringe calibrated in 'units' (typically 100 units = 1ml) used for subcutaneous injections. Available in 0.3ml, 0.5ml, and 1ml sizes with 29-31 gauge needles.