BAC water

BAC water (short for bacteriostatic water) is sterile water for injection that contains 0.9% benzyl alcohol, which acts as a preservative to help inhibit bacterial growth. It is commonly used to reconstitute (mix) certain medications or peptides that come as a lyophilized (freeze-dried) powder. Key points:

Purpose: Used to dissolve medications or peptides before administration when specified by the manufacturer or prescribing clinician.
Preservative: The 0.9% benzyl alcohol allows the vial to be used for multiple withdrawals when handled properly.
Storage: Follow the manufacturer’s instructions. Once opened, bacteriostatic water is generally discarded after 28 days to reduce contamination risk.
Not interchangeable: Bacteriostatic water is different from sterile water for injection, which contains no preservative and is typically intended for single-use.
Important precautions: Bacteriostatic water containing benzyl alcohol should not be used in newborns or certain other patients because benzyl alcohol can be harmful in those populations.

If you’re asking about BAC water in the context of peptides such as BPC-157, TB-500, or GHK-Cu, it’s often used to reconstitute peptide powders only if the product’s instructions specify it. The appropriate diluent, mixing method, and storage depend on the specific product and manufacturer. If you have a particular peptide or vial size in mind, I can explain the general labeling and handling guidance.

$10.00

Bulk Order Savings The more you order, the more you save.

5% OFF

2+ Units

$9.50 each

You Save $0.50

You may also research

[asnp_badge]

GLP-3 (RT)

$45.00

[asnp_badge]

tirzepatide

$45.00

[asnp_badge]

Ghk-cu

$30.00

[asnp_badge]

Tesamorlin

$65.00

Research Use and Compliance

Please review and acknowledge before accessing the website.

Researcher verification

K Product sells research peptides exclusively to qualified researchers and laboratories for in vitro and laboratory use. Please confirm before continuing.

I am at least 21 years of age. I agree to the Terms of Service and Privacy Policy.

Decline & Exit

By proceeding you affirm the statements above are true. Products are not for human or veterinary use, not for use in diagnostic procedures, and have not been evaluated by the U.S. Food and Drug Administration. Privacy Policy.