Explore Bacteriostatic Water dosage trends, reconstitution volumes, and vial size patterns from anonymized WPA peptide calculator data.
Bacteriostatic water is the sterile diluent used to reconstitute lyophilized research peptides — water with 0.9% benzyl alcohol added so a sealed vial can be re-entered over several weeks. It's a consumable, not a research compound, so what matters is sterility and the correct preservative, not purity assays.
The 0.9% benzyl alcohol concentration is bacteriostatic (inhibits bacterial growth) but not bactericidal — it prevents proliferation of contaminating microorganisms in a multi-dose vial after the first puncture, allowing the vial to be used for ~28 days (typical USP monograph guidance) before the preservative effect can no longer be assumed reliable.[1][2] Without the preservative, sterile water for injection must be used immediately or discarded after a single draw.
Bacteriostatic Water is an FDA-regulated drug product (USP monograph) used across compounding pharmacies, hospital pharmacies, and research-peptide reconstitution contexts.[1] Important safety considerations: BWFI is **contraindicated in neonates** because benzyl alcohol can cause "gasping syndrome" in newborns (the basis for the FDA / ISMP labelling guidance);[2][3] and BWFI is not interchangeable with standard sterile water for injection for IV bolus or large-volume infusion.
FDA-regulated drug product (USP monograph) for reconstitution of injectable medications. **Contraindicated in neonates.** Not interchangeable with plain sterile water for injection for IV bolus or large-volume use. Standard reconstitution diluent for peptide research; not itself an active research compound.
It is catalogued under Other Peptides on WPA.
7 Bacteriostatic Water reconstitution calculations have been logged by the WPA community.
This is the lifetime header population. Each chart and its associated analysis below use their own selected period and denominator; frequency responses are a separate cohort.
These figures come from anonymized WPA peptide calculator sessions, not verified administrations or unique people. Separate modal inputs do not establish a joint protocol. They are community input statistics — not dosing recommendations, and not medical advice.
These figures come from anonymized WPA peptide calculator sessions.
All figures shown are aggregated from anonymized calculator inputs and are provided strictly for independent laboratory research and educational purposes. They are community usage statistics — not dosing recommendations, and not medical advice.