Question 1

What is bacteriostatic water?

Accepted Answer

Bacteriostatic water is sterile water containing 0.9% benzyl alcohol, which prevents bacterial growth after the vial is punctured. Researchers use it to reconstitute lyophilized peptides, so a single vial can be drawn from multiple times without contamination.

Question 2

How much bacteriostatic water do I need?

Accepted Answer

Typical peptide vials require 1–3 mL of BAC water each. Most researchers buy 10 mL vials and use one BAC vial for several peptides over 3–4 weeks. A 30 mL vial covers a longer research cycle at a better per-mL price.

Question 3

What's the difference between bacteriostatic water and sterile water?

Accepted Answer

Sterile water has nothing added; it goes bad quickly once opened. Bacteriostatic water contains 0.9% benzyl alcohol as a preservative, letting a punctured vial be reused for up to 28 days. Only bacteriostatic water is appropriate for reconstituting research peptides used across multiple sessions.

Question 4

What's the cheapest bacteriostatic water per mL right now?

Accepted Answer

Prices update daily as vendor scrapes refresh. This page ranks every listing by per-mL price so the top row is always the current best deal — usually a 10 mL or 30 mL vial from an established vendor.

Question 5

Is bacteriostatic water available in different sizes?

Accepted Answer

Yes. Common sizes are 3 mL, 5 mL, 10 mL, and 30 mL. 10 mL is the most common single-vial size for research use; 30 mL is generally the best per-mL value if you have a running research program.

Question 6

Where is bacteriostatic water shipped from?

Accepted Answer

Every vendor listed ships from US-based facilities unless the brand page says otherwise. Delivery is typically 3–7 business days. Check the vendor's own site for the current shipping guarantee before ordering.

Question 7

Can I use bacteriostatic water for anything besides peptides?

Accepted Answer

Bacteriostatic water is a research reagent. All products listed on Peptidemap are for research use only (RUO); we do not provide any human or veterinary use guidance.

Cheapest Bacteriostatic Water