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HPLC PurityUSP-grade
Tested byJanoshik Analytical
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4.4 / 5
Trustpilot⚠ Research Use Only
Not for human consumption, veterinary use, or clinical administration. Sold exclusively to qualified laboratories and researchers for in-vitro study.
Bacteriostatic water (BAC water) is sterile water preserved with 0.9% benzyl alcohol — the industry-standard diluent for reconstituting lyophilized (freeze-dried) peptides and research compounds in laboratory settings. The benzyl alcohol acts as a bacteriostatic agent, inhibiting microbial growth and allowing the solution to remain stable after initial opening, which is important for multi-use research vials.
In peptide reconstitution protocols, the choice of diluent matters. Unlike plain sterile water, bacteriostatic water resists contamination over multiple draw cycles, making it the preferred choice for researchers working with lyophilized peptides that require repeated sampling. It is chemically inert and does not react with standard peptide compounds.
BAC water is used across a wide range of research disciplines — from endocrinology and peptide biology to pharmacology. Any lab working with freeze-dried peptide compounds will typically include bacteriostatic water as a core consumable in their reconstitution workflow.
myPEPT supplies bacteriostatic water in clearly labeled, sealed vials at research-grade standard. Each batch is verified for sterility and benzyl alcohol concentration, and we ship across the EU with the documentation needed for lab intake.
What researchers should know: This product is a laboratory diluent intended for use in research settings. It is not for injection into humans or animals outside of approved clinical or veterinary contexts. Always follow your institution's protocols when handling sterile materials.
Supplier SKUMYPBA
Specification3 ml/vial
PurityUSP-grade
Molecular Weight18.015 Da
Molecular FormulaH₂O + 0.9% C₇H₈O
CAS Number7732-18-5 (water); 100-51-6 (benzyl alcohol)
AppearanceClear, colourless sterile liquid
Solubility / ReconstitutionReady-to-use solution. No reconstitution required.
Storage InstructionsStore unopened vials at room temperature (20–25°C), protected from heat and freezing. After first puncture, store at 2–8°C and discard after 28 days.
Shelf Life36 months (unopened, room temperature); 28 days after first puncture (2–8°C)
Testing Scope
SterilityEndotoxins
Supplier SKUMYPBA
Specification3 ml/vial
PurityUSP-grade
Molecular Weight18.015 Da
Molecular FormulaH₂O + 0.9% C₇H₈O
CAS Number7732-18-5 (water); 100-51-6 (benzyl alcohol)
AppearanceClear, colourless sterile liquid
Solubility / ReconstitutionReady-to-use solution. No reconstitution required.
Storage InstructionsStore unopened vials at room temperature (20–25°C), protected from heat and freezing. After first puncture, store at 2–8°C and discard after 28 days.
Shelf Life36 months (unopened, room temperature); 28 days after first puncture (2–8°C)
Testing Scope
SterilityEndotoxins
HPLC + Mass-Spec Verified
Third-party tested each batch.
24-hour EU Dispatch
Cold-packed from Antwerp warehouse. Typical 2–5 day delivery.
Discreet, Secure Checkout
iDEAL, SEPA, card & crypto. No product references on invoice.
COA on Every Order
Certificate of Analysis matched to your exact lot, by email.
Frequently asked
7 questionsHow fast is delivery and which carriers do you use?
Orders placed before 16:00 CET ship the same business day from the Netherlands via DPD or PostNL. EU-wide delivery typically takes 2–5 working days, fully tracked. Every parcel ships in plain, unbranded packaging with no peptide-related markings visible.
Which payment methods do you accept?
We accept iDEAL (Netherlands), Bancontact (Belgium), PayPal, Klarna pay-later, SEPA instant bank transfer, and Visa/Mastercard credit and debit cards. All payments are processed through PCI-DSS-compliant European processors. Bank transfer and card orders ship within 24 hours of payment confirmation.
How do you verify peptide purity?
Every batch is HPLC-tested to 99% purity or higher by an independent third-party laboratory, with identity confirmed by mass spectrometry. The batch-specific Certificate of Analysis is published on every product page and delivered with the order.
Are research peptides legal to buy in the Netherlands and EU?
Yes — when sold and purchased strictly for in-vitro laboratory research. Research peptides on my\PEPT.eu are not approved, marketed or intended for human or veterinary use, medical diagnosis or therapeutic application. By placing an order you confirm research-only intent and accept responsibility for compliance with local regulations.
How should research peptides be stored?
Lyophilized (freeze-dried) peptides keep up to 24 months at −20 °C in a sealed vial. Once reconstituted in bacteriostatic water, store at 2–8 °C and use within 28 days. Avoid repeated freeze-thaw cycles and direct sunlight.
What is bacteriostatic water and what is it used for in laboratory research?
Bacteriostatic water (BAC water) is sterile water for injection containing 0.9 % benzyl alcohol as a bacteriostatic preservative. In laboratory research it is used as a reconstitution solvent for lyophilized peptides and proteins, allowing multi-draw use of a single vial over a defined period without microbial growth. my\PEPT.eu supplies BAC water as a research-grade laboratory reagent. It is not for human or veterinary consumption.
How long is bacteriostatic water stable and how should it be stored?
Unopened bacteriostatic water vials are stable at room temperature (15–25 °C), away from direct light, until the printed expiry date — typically 24 months from manufacture. Once the septum has been pierced, use within 28 days and keep refrigerated at 2–8 °C. Supplied as a laboratory reagent only — not for human or veterinary consumption.
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For research use only. This product is intended exclusively for in-vitro research and laboratory applications. Not approved for human or animal consumption, medical treatment, or therapeutic use.
