Research-grade compound. Laboratory use only. Not intended for human or animal use, ingestion, or injection. No medical claims are made or implied.
Bacteriostatic Water
This size comes with our supplier batch specification.
Free shipping on orders over €200
- If a product doesn't match the specification on its published COA, contact us with your batch number: we investigate against the lot's report and replace any product that fails it, at no cost to you.
- Contact us within 48 hours of delivery with photos of the outer box, inner packing, and any affected vials with labels legible. Confirmed transit damage is replaced at no cost to you.
This size comes with our supplier batch specification.
3–7 days most of the EU · 10–14 Nordics/Baltics
Standard EU from €4.99 (RO) · core EU GLS €17.99 · Nordics/Baltics €12.99–€15.99 · Dispatched within 1–2 business days · Free shipping over €200.00 · no customs paperwork (EU) · via EU carrier network
€200.00 away from free shipping over €200.00. Under that, standard EU shipping is €17.99 (GLS, most of the EU).
How Paysera and SEPA work
- Pay: send a manual SEPA transfer using the IBAN we email you, or, where checkout offers it for your address, approve a SEPA transfer in your own bank via Paysera's hosted page.
- We confirm — Paysera notifies us instantly, or we match a manual transfer when it arrives (usually 1 business day).
- We dispatch — confirmed orders typically ship within 1–2 business days.
Card payments are not currently offered. There is no card processor on this checkout.
USP-grade bacteriostatic water (3ml, 5ml or 10ml vials) with 0.9% benzyl alcohol. Sterile, endotoxin-tested. For peptide reconstitution.
| Quantity | Price Each | Total | Savings |
|---|---|---|---|
| 1 unit | €5.99 | €5.99 | -- |
| 3+ | €5.69 | €17.07 | 5% off |
| 5+Most Popular | €5.39 | €26.96 | 10% off |
| 10+ | €5.09 | €50.92 | 15% off |
Important Notice
This product is intended for laboratory and research use only. Not for human or veterinary use. By purchasing, you confirm this product will be used exclusively for in-vitro research purposes.
Due to legal and regulatory requirements, this product cannot be shipped to: Sweden.
Published laboratory reports are available for selected lots. Check each report for its result and stated method. For research purposes only.
This size comes with our supplier batch specification.
Dispatched within 1–2 business days, shipping from €4.99 in Romania, from €12.99 across the rest of Europe
Class-level specification on record; independent Janoshik report on selected lots
About Bacteriostatic Water
Bacteriostatic water is sterile water containing 0.9% benzyl alcohol (9mg per ml) as a bacteriostatic preservative. It is the standard reconstitution medium for research peptides that will be stored after preparation and used over multiple sessions. The benzyl alcohol does not sterilize -- it does not kill existing contamination -- but it prevents bacterial growth from needle punctures and environmental exposure, extending the usable window of a reconstituted peptide solution to approximately 28-30 days when kept refrigerated.
When to Use Bacteriostatic Water
Any peptide protocol that involves reconstituting a vial and using it for multiple doses over days or weeks should use bacteriostatic water. The alternative -- sterile water -- has no preservative action and is appropriate only for single-use, immediate-consumption reconstitutions. In practice, most research protocols involving peptides dosed repeatedly in animal studies or kept as working stocks in cell culture work default to bacteriostatic water for this reason.
One consideration: benzyl alcohol is biologically active at higher concentrations. At 0.9% in a reconstitution vial, the contribution to a typical in vivo dose or in vitro working concentration is negligible. However, if you are performing a sensitive cell viability assay or working with very high volumes of reconstituted solution per experiment, it is worth calculating the final benzyl alcohol concentration in the experimental medium and comparing to known cytotoxicity thresholds (generally above 0.1% in culture).
Specifications
| Parameter | Value |
|---|---|
| Volume | 3ml, 5ml or 10ml vial |
| Preservative | 0.9% benzyl alcohol (9mg/ml) |
| pH | 4.5 - 7.0 |
| Sterility | Sterile filtered |
| Endotoxins | <0.5 EU/ml |
Storage
Store unopened vials at room temperature or at 4°C, away from light. Once the vial septum has been punctured, refrigerate at 2-8°C and use within 28 days. Label with opening date. Discard if the solution becomes cloudy, discolored, or if visible particulates appear -- all of which indicate contamination despite the preservative. Do not freeze bacteriostatic water as this can cause precipitation.
Can bacteriostatic water be used for every type of peptide?
For the vast majority of synthetic research peptides, yes. The main exceptions are highly acid-sensitive or base-sensitive sequences where the pH 4.5-7.0 range of bacteriostatic water could affect stability, and some labile peptides where even the small amount of benzyl alcohol might interfere with the assay. For most standard peptides -- BPC-157, GLP-1 analogues -- bacteriostatic water is fully compatible and is the recommended reconstitution medium.
How is reconstitution volume related to working concentration?
That is determined by the working concentration your assay requires, not by the solvent. Concentration is simply the peptide mass in the vial divided by the volume of solvent added: 2mg reconstituted in 2ml gives 1mg/ml, and 5mg in 2.5ml gives 2mg/ml. Choose the volume that puts the compound in the concentration range your protocol calls for, and keep the total within the vial's capacity. Note that a larger reconstitution volume means a more dilute solution.
Bacteriostatic water is supplied for laboratory research use only. For research purposes only.
Specification Summary
About Bacteriostatic Water
Bacteriostatic water is sterile water containing 0.9% benzyl alcohol (9mg per ml) as a bacteriostatic preservative. It is the standard reconstitution medium for research peptides that will be stored after preparation and used over multiple sessions. The benzyl alcohol does not sterilize -- it does not kill existing contamination -- but it prevents bacterial growth from needle punctures and environmental exposure, extending the usable window of a reconstituted peptide solution to approximately 28-30 days when kept refrigerated.
When to Use Bacteriostatic Water
Any peptide protocol that involves reconstituting a vial and using it for multiple doses over days or weeks should use bacteriostatic water. The alternative -- sterile water -- has no preservative action and is appropriate only for single-use, immediate-consumption reconstitutions. In practice, most research protocols involving peptides dosed repeatedly in animal studies or kept as working stocks in cell culture work default to bacteriostatic water for this reason.
One consideration: benzyl alcohol is biologically active at higher concentrations. At 0.9% in a reconstitution vial, the contribution to a typical in vivo dose or in vitro working concentration is negligible. However, if you are performing a sensitive cell viability assay or working with very high volumes of reconstituted solution per experiment, it is worth calculating the final benzyl alcohol concentration in the experimental medium and comparing to known cytotoxicity thresholds (generally above 0.1% in culture).
Specifications
| Parameter | Value |
|---|---|
| Volume | 3ml, 5ml or 10ml vial |
| Preservative | 0.9% benzyl alcohol (9mg/ml) |
| pH | 4.5 - 7.0 |
| Sterility | Sterile filtered |
| Endotoxins | <0.5 EU/ml |
Storage
Store unopened vials at room temperature or at 4°C, away from light. Once the vial septum has been punctured, refrigerate at 2-8°C and use within 28 days. Label with opening date. Discard if the solution becomes cloudy, discolored, or if visible particulates appear -- all of which indicate contamination despite the preservative. Do not freeze bacteriostatic water as this can cause precipitation.
Can bacteriostatic water be used for every type of peptide?
For the vast majority of synthetic research peptides, yes. The main exceptions are highly acid-sensitive or base-sensitive sequences where the pH 4.5-7.0 range of bacteriostatic water could affect stability, and some labile peptides where even the small amount of benzyl alcohol might interfere with the assay. For most standard peptides -- BPC-157, GLP-1 analogues -- bacteriostatic water is fully compatible and is the recommended reconstitution medium.
How is reconstitution volume related to working concentration?
That is determined by the working concentration your assay requires, not by the solvent. Concentration is simply the peptide mass in the vial divided by the volume of solvent added: 2mg reconstituted in 2ml gives 1mg/ml, and 5mg in 2.5ml gives 2mg/ml. Choose the volume that puts the compound in the concentration range your protocol calls for, and keep the total within the vial's capacity. Note that a larger reconstitution volume means a more dilute solution.
Bacteriostatic water is supplied for laboratory research use only. For research purposes only.