What the label states, the lot delivers — net peptide mass, not gross powder weight, purity reported as measured rather than rounded up, and a Certificate of Analysis for every lot.
Net peptide mass, not powder weight; purity as measured, not rounded up; a COA per lot.
Net peptide + purity not rounded up. COA per lot.
FDA PCAC reviews 7 peptides for the 503A bulks list (BPC-157, KPV, TB-500, MOTs-C, Emideltide, Semax, Epitalon). Read our compounder's decision tree. Read our briefing →
FDA PCAC reviews 7 peptides for the 503A bulks list in July. Read →
FDA PCAC: 7 peptides under review. Read →
0.9% benzyl-alcohol bacteriostatic water
Vialdyne primary owner
This Vialdyne page is the primary SEO owner for buyers evaluating BAC Water (Bacteriostatic Water for Injection) through a pharmacy QA, clinic procurement, or regulated-sourcing workflow. It should answer whether the buyer can request a batch COA, release-test scope, destination-market review, and add-on documentation before moving into pricing or repeat inventory planning.
Overview
Bacteriostatic Water for Injection, catalogued here as BAC Water, is preserved sterile water for injection that carries 0.9% benzyl alcohol as the antimicrobial agent. The presentation is purpose-built as a multi-use reconstitution medium for peptides and related sterile injectable preparations. Once the rubber septum has been pierced, the benzyl-alcohol preservative holds microbial growth in check across the USP-compendial 28-day window, which is the standard expectation for preserved injectable solutions. For peptides documented as preservative-compatible, this is the workhorse diluent in 503A compounding pharmacy workflows: a single vial supports many small doses across multiple weeks without forcing single-use sterile preparation on every dispense. Vialdyne releases BAC Water in 3 ml and 10 ml sterile vial presentations, manufactured from pharmaceutical-grade benzyl alcohol and Water for Injection. Compatibility is the load-bearing caveat for the receiving pharmacy: BAC Water is not appropriate for every peptide. Some short peptides interact with benzyl alcohol or with the preservative system in ways that can erode potency or contaminate downstream assays, and the right alternative for those is preservative-free Sterile Water for Injection (SWFI) in single-use aliquot preparation. The benzyl-alcohol content is reproduced on the product label and on the released-batch COA for every shipment, so the pharmacy can match the diluent to the peptide stability data on file.
Applications & buyer fit
Custom-blend buyers are almost always OEM clients building a branded product around a specific ratio of two or more peptides. The development workflow is collaborative: ratio target, analytical method to verify it, stability protocol in the chosen carrier, and packaging selection are all defined in the OEM brief before the first commercial run. Sample-stage volumes are usually 5-10 g of finished blend; commercial MOQ depends on the components.
Sourced for
Buyer fit
Documentation that ships
Procurement note: Ratio target, the analytical method to verify it, stability protocol, and packaging are defined in the OEM brief before the first commercial run.
Primary buyer fit: 503A / 503B compounding pharmacies, medical aesthetic clinics and med spas, and regional distributors and re-sellers.
Specifications
Certificate of Analysis
Published released-batch COAs for BAC Water (Bacteriostatic Water for Injection), every lot HPLC-verified. These are previews — request the full high-resolution certificate for any lot.
VerifiedRequest full COA →BAC Water (Bacteriostatic Water for Injection)
VD260428-BAC028
VerifiedRequest full COA →BAC Water (Bacteriostatic Water for Injection)
VD260428-BAC027
Regulatory note
A reconstitution diluent that carries a benzyl-alcohol preservative. Against your target market's regulations, confirm sterility, endotoxin, and injectable-grade compliance. It is not universally compatible with every peptide, and preservative-free SWFI is required for some.
Frequently asked questions
Treat it as an injectable in its own right, not a commodity solvent. The certificate should confirm the benzyl-alcohol content at the labeled 0.9%, sterility, bacterial endotoxin below the injectable limit, pH within the compendial band, container-closure integrity, and particulate matter. Ask for the fill volume and overfill, the lot number tying the vial to that certificate, and the assigned expiry. For pharmacy qualification, also confirm the container-closure system tolerates repeated septum entry, since the whole rationale for a preserved diluent is multi-dose use. Compendial USP conformance for the preserved-water monograph should be stated explicitly on the paperwork.
Yes, and it is worth flagging at the formulation stage rather than at dispensing. Benzyl alcohol carries a well-documented caution for neonates and is generally minimized in preparations intended for infants, and it can provoke sensitivity in a small subset of patients. A preservative-free water is the conservative diluent when the finished preparation may reach those populations. For routine adult multi-dose subcutaneous use the preserved diluent is appropriate, but your formulation record should document the diluent choice and the rationale so the population limitation travels with the preparation.
Related peptides
