RESEARCH USE ONLY - Not for human or veterinary use. Supplied for lawful in vitro research and qualified laboratory investigation only.·QUALITY - Peptide catalogue items are specified at ≥99% purity with batch documentation. Store lyophilised powders as directed before reconstitution.·COMPLIANCE - You are responsible for lawful purchase, possession, and use in your jurisdiction, including institutional and safety requirements.·SAFE HANDLING - Use trained personnel, appropriate PPE, and aseptic technique. Do not ingest, inject, or use outside a controlled research setting.·POLICIES & ORDERS - Shipping, returns, and research-use terms apply to every order. Read our Research Use Policy and footer legal links before buying.·
Sterile water for injection with benzyl alcohol · 10ml vial
Sterile
Research use
Bacteriostatic sterile water (BSW) contains 0.9% benzyl alcohol as a antimicrobial preservative, allowing multidose withdrawal for reconstitution of lyophilised research peptides when your protocol specifies preserved diluent. Not a therapeutic product; for qualified laboratory use only.
Bacteriostatic water for injection (BWFI) is sterile water containing a low concentration of benzyl alcohol (typically 0.9% w/v) as a bacteriostatic preservative. Unlike plain sterile water for injection (SWFI), which contains no preservative and should be discarded after a single draw, BWFI suppresses microbial growth in the vial after the rubber septum has been punctured - provided good aseptic technique and storage conditions are maintained.
Research laboratories routinely specify BWFI when preparing multi-dose working solutions of lyophilised peptides: after reconstitution, the peptide–diluent mixture may be stored short-term under refrigeration and withdrawn repeatedly for aliquoting into assays. Always defer to your peptide’s stability data, institutional SOP, and any manufacturer monograph for the specific compound.
Optimus Peptides lists this item as a laboratory accessory for peptide reconstitution workflows. It is not a therapeutic product and is not sold for human or veterinary injection outside legally approved research.
Product
Bacteriostatic water (BWFI)
Preservative
0.9% benzyl alcohol
Fill Volume
10ml per vial
Typical use
Peptide reconstitution (research)
Research & laboratory context
Choosing a reconstitution solvent affects both microbial control and, in some cases, peptide solubility or aggregation behaviour. Common decision points include:
Single-use vs multidose: SWFI is appropriate when the entire volume will be consumed in one session. BWFI is often preferred when the same vial will be entered multiple times over days or weeks.
Benzyl alcohol compatibility: A small subset of peptides or proteins is sensitive to preservatives; verify compatibility with your analytical method (e.g. mass spectrometry, bioassay).
Aseptic technique: Preservatives reduce risk but do not replace filtered airflow, sterile needles, alcohol swabbing of septa, and trained operators.
Stability after reconstitution: Lyophilised peptides may be stable for months frozen, but liquid stocks often require strict temperature limits and expiry dating - document in your lab notebook / LIMS.
Pairing with Optimus peptides
Our lyophilised metabolic and regenerative peptides (for example GLP-RT, GLP-TZ, GLP-SM, MT-2, GHK-Cu) are supplied dry for stability. BWFI is the diluent most frequently cited in research protocols when investigators plan refrigerated multi-use vials after reconstitution.
Technical specifications
Composition
Sterile water for injection + 0.9% benzyl alcohol
Volume
10ml per glass vial
Appearance
Clear, colourless liquid
Closure
Rubber septum (multi-dose entry)
Osmolality
Hypotonic vs plasma (typical of water-based diluents)
Storage
Room temperature or as labelled; protect from light
In-use period
Follow local monograph / SOP after first puncture
Regulatory note
Sold for research reconstitution only - not a drug product listing
Frequently asked questions
Is bacteriostatic water the same as sterile water for injection?
No. SWFI contains no antimicrobial preservative and is intended for single puncture / single use in most jurisdictions. BWFI contains benzyl alcohol to inhibit bacterial growth between punctures when stored correctly.
Can I use this to inject people or animals?
No. This SKU is sold for qualified laboratory reconstitution of research peptides. Clinical or veterinary injection requires licensed medicinal products and professional oversight.
How much diluent do I need for my peptide vial?
Calculate concentration as mg peptide ÷ ml diluent. Example: reconstituting 5mg in 2ml BWFI yields 2.5mg/ml. Adjust volume to match your dosing matrix and pipetting accuracy.
Will benzyl alcohol damage my peptide?
Most small lyophilised peptides tolerate 0.9% benzyl alcohol for typical research holding times, but exceptions exist. If your protocol forbids preservatives, use SWFI and single-use aliquots instead.
