RUO · ≥99% HPLC
Bacteriostatic Water
≥99% HPLC purity · certificate of analysis on request
€10.00
plus shipping · free from €250
- Same-day dispatch from the Netherlands when paid before 14:00 CET
- ≥99% HPLC – lab reports
- Payment – SEPA bank transfer or crypto
- Discreet, tracked parcel – free shipping from €250
- 3 ml · 10 ml · sterile bacteriostatic water
- ≥99% HPLC purity · certificate of analysis on request
- Same-day dispatch from the Netherlands · free shipping from €250
Buy Bacteriostatic Water at Pepcore: Bacteriostatic Water as sterile bacteriostatic water (3 ml · 10 ml), ≥99% HPLC purity, dispatched from the Netherlands the same business day. BAC Water (Bacteriostatic Water) is sterile water containing 0.9% benzyl alcohol as a bacteriostatic preservative. It is supplied in 3 ml and 10 ml glass vials for laboratory research use, primarily as a diluent for reconstituting lyophilized peptides and research compounds.
Buy Bacteriostatic Water: key facts
- Available amounts: 3 ml · 10 ml
- Form: Sterile bacteriostatic water
- Price: from €10.00
- Dispatch: same business day from the Netherlands when paid before 14:00 CET (Mon–Sat)
- Shipping: tracked across Europe – free from €250
- Payment: SEPA bank transfer or crypto (USDC, USDT, Bitcoin)
Bacteriostatic Water at a glance
In research workflows, BAC Water is commonly used to dissolve lyophilized peptide powders into liquid form for downstream experimental work. The bacteriostatic preservative inhibits bacterial growth in multi-use vials, extending the working life of reconstituted research solutions under standard laboratory storage conditions.
Pepcore supplies BAC Water as sterile 3 ml and 10 ml vials manufactured to laboratory research grade and dispatched from the EU with fast shipping.
What is Bacteriostatic Water?
Bacteriostatic water is purified water (USP/EP-grade) containing 0.9% benzyl alcohol added as a preservative agent. Unlike sterile water for injection (which contains no preservative), bacteriostatic water can be used multiple times from the same vial without significant risk of bacterial contamination, making it the standard diluent in research environments where peptide vials are reconstituted and stored over multiple weeks.
The benzyl alcohol concentration is calibrated to provide antimicrobial protection without altering the chemical activity of most peptide research compounds. This balance makes bacteriostatic water the most widely used reconstitution diluent across peptide research laboratories.
Bacteriostatic Water: structure and specifications
| Class | Sterile diluent solution |
|---|---|
| Primary component | Water (H₂O), 99.1% |
| Preservative | Benzyl alcohol, 0.9% |
| Molecular Formula | H₂O |
| Molecular Weight | 18.02 g/mol |
| CAS Number | 7732-18-5 |
| Available amounts | 3 ml · 10 ml |
| Form | Sterile bacteriostatic water |
| Storage | 15–25 °C; after opening 2–8 °C |
| Use | Laboratory research only (RUO) |
Bacteriostatic Water in laboratory research
BAC Water is water containing benzyl alcohol as a bacteriostatic preservative. The preservative helps limit bacterial growth after repeated vial access, but it does not sterilize contaminated solutions and does not determine the stability of the reconstituted peptide.
Research Applications
Peptide Reconstitution
BAC Water is commonly used as a diluent for reconstituting lyophilized peptides in laboratory research workflows, where compatible with the compound and protocol.
Multi-Use Vial Handling
The benzyl alcohol preservative supports repeated withdrawals from the same vial under aseptic laboratory conditions. Storage duration and temperature should be determined by the peptide, concentration, and research protocol.
Solution Preparation
Used for preparing controlled-concentration peptide solutions for analytical assays and in-vitro research models, where benzyl alcohol is compatible with the assay system.
Comparative Baseline
Provides a consistent diluent baseline across experimental replicates, helping reduce solvent-related variability.
Conclusion BAC Water is a commonly used bacteriostatic diluent for peptide reconstitution and laboratory solution preparation. Reconstituted peptide stability depends on the specific compound and protocol. For laboratory research use only.
Use and storage
Bacteriostatic water is sterile water with 0.9% benzyl alcohol, which inhibits bacterial growth after the vial has been opened. It is used to reconstitute lyophilized research peptides – see our reconstitution guide and peptide calculator.
Store unopened vials at room temperature. After the first puncture, keep the vial at 2–8 °C and use it within 28 days.
Buy Bacteriostatic Water from Pepcore: shipping and payment
Orders paid before 14:00 CET (Monday–Saturday) leave our Netherlands warehouse the same business day in discreet, tracked packaging. Delivery takes 1–2 business days to the Netherlands and Belgium, 2–7 to Germany, France, Spain, Italy and Luxembourg and 3–8 to the rest of the EU; the UK, Switzerland and Norway take 5–10 days plus customs. Shipping costs from €8.49 and is free from €250 – see our shipping policy.
When you buy Bacteriostatic Water at Pepcore you pay by SEPA bank transfer – we email you our bank details right after your order – or with crypto: USDC or USDT on Polygon, USDC on Base, or Bitcoin. No customer account and no card details are needed.
Frequently asked questions
What is bacteriostatic water and what is it used for?
Bacteriostatic water is sterile water with 0.9% benzyl alcohol. The additive stops bacteria from growing, so a vial can be drawn from more than once in the lab. It is the standard diluent for reconstituting lyophilized peptides for research. Supplied in 3 ml and 10 ml vials, for laboratory research only.
How is bacteriostatic water different from sterile water?
Sterile water without an additive is meant for a single draw, because microbes can grow once the vial has been pierced. The benzyl alcohol in bacteriostatic water holds that growth back, so one vial can be used in the lab over a longer period.
Where can I buy Bacteriostatic Water in Europe?
You can buy Bacteriostatic Water online at Pepcore. We ship from the Netherlands to every European country with tracking, free from €250, and a certificate of analysis is available on request.
How is a peptide reconstituted with bacteriostatic water?
The water is added slowly down the inside wall of the peptide vial, not straight onto the powder, and the vial is swirled gently, never shaken. Our peptide calculator gives the right amount of water for the concentration you want.
How long does shipping take?
Orders leave the Netherlands the same or next business day. Delivery takes 1 to 2 business days to the Netherlands and Belgium, 2 to 7 business days to Germany, France, Spain, Italy and Luxembourg and 3 to 8 business days to the rest of Europe. Shipping is free from €250, and every parcel gets a tracking number as soon as it is on its way. See shipping.
How is bacteriostatic water stored?
Unopened at room temperature, away from light. Once the vial has been pierced it is kept refrigerated and used within the period usual in the lab.
Is Bacteriostatic Water intended for human use?
No. Bacteriostatic Water is sold exclusively for in vitro research and laboratory use. It is not a medicine, food supplement or cosmetic, and it must not be used on humans or animals.
Scientific references
- United States Pharmacopeia (USP). Bacteriostatic Water for Injection monograph.
- European Pharmacopoeia (EP). Water for Injection and bacteriostatic water specifications.
- American Pharmacists Association. Benzyl alcohol as a preservative in pharmaceutical research diluents.
More studies: PubMed: Bacteriostatic Water
Ready to buy Bacteriostatic Water? Choose your amount above – orders paid before 14:00 CET ship the same day, and shipping is free from €250. For questions about Bacteriostatic Water or a larger research order, write to us at info@pepcore.net.
For laboratory research use only – not for human or veterinary use. All Pepcore products are sold strictly as research materials for in vitro use. They are not medicines, supplements, foods or cosmetics. Sold only to adults aged 18 and over.
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