What is Bacteriostatic Water?
Bacteriostatic water is sterile water containing 0.9% benzyl alcohol, which inhibits bacterial growth after the vial is first punctured. It is the standard diluent for reconstituting lyophilized research peptides.
Key facts
- Compound class: Sterile water with 0.9% benzyl alcohol
- Composition: Sterile water, 0.9% benzyl alcohol
- Volume: 10ml or 30ml
- Form: Sterile solution
- Research area: Reconstitution Supplies
In laboratory research
It suits most peptides in the catalog and allows repeated withdrawals from one vial during a laboratory study.
Related compounds
Within our reconstitution supplies collection, this solution is most often compared with Acetic Acid Water, a 0.6% acetic acid sterile solution. Running related compounds side by side, with matched vehicle controls and the same assay conditions, makes it easier to attribute differences in a readout to the compound itself rather than to handling or batch effects.
Sterile filtered diluents for reconstituting lyophilized research peptides in the laboratory. Choose bacteriostatic water for most peptides or acetic acid water for compounds that dissolve poorly at neutral pH.
Choosing a size
This solution comes in 2 sizes. Smaller vials suit pilot experiments and method development, while larger vials lower the cost per unit for longer studies and replicate runs.
- 10ml: $19.99, about $2.00 per ml
- 30ml: $29.99, about $1.00 per ml
Moving from the 10ml vial to the 30ml vial reduces the cost per ml by roughly 50 percent. If a study needs several smaller aliquots, one larger vial reconstituted and divided under your lab protocol is often the most economical option.
Using it in the laboratory
Draw the solution with a sterile syringe and add it slowly down the inside wall of the peptide vial. Swirl gently until the powder dissolves rather than shaking, which can cause foaming. Wipe the stopper with alcohol before each puncture and record the date the vial was first opened.
Each 10ml or 30ml vial can serve several reconstitutions, so it pairs naturally with multi vial orders and research bundles.
Storage and stability
Store sealed vials at controlled room temperature, away from direct light. After the first puncture, use aseptic technique and follow your laboratory protocol for in use time.
Batch documentation
Every lot carries a batch number that links it to a certificate of analysis recording identity by mass spectrometry and purity by HPLC. Request the COA for your batch at any time, and keep it with your lab records alongside the concentration and date of reconstitution.
Research use only
This solution is sold strictly for in vitro and preclinical laboratory research. It is not a drug, food, dietary supplement or cosmetic, it has not been approved for any human or veterinary use, and it must not be administered to people or animals. Researchers are responsible for following the rules of their institution and country. Read our full research use disclaimer.
Related research compounds
Browse all bacteriostatic water and reconstitution supplies or see the peptide research guide for storage and reconstitution basics.
