Peptide Central
Sterile water and bacteriostatic water are different reagents, and the difference is a preservative. A non-clinical reference on reagent identity and labelling.
This page concerns the identity and labelling of two laboratory reagents. It is not a treatment guide, a recommendation, a preparation protocol or guidance on handling any material for administration to a human or animal. No preparation procedure is given here.
Sterile water for injection is water that has been sterilised and contains no antimicrobial preservative. Once a sealed container is opened, nothing in it inhibits microbial growth.
Bacteriostatic water is sterilised water containing an antimicrobial preservative — conventionally benzyl alcohol at 0.9% w/v. The preservative is bacteriostatic rather than bactericidal: it inhibits the multiplication of organisms rather than killing those already present.
That single compositional difference is the whole distinction, and it is what the two labels denote. Both are listed as laboratory reagents: bacteriostatic water 10ml and bacteriostatic water 3ml.
Three points follow from the chemistry and are frequently stated incorrectly:
Where a reagent is used to dissolve a material for laboratory work, its composition becomes part of the experimental system. A preservative-containing diluent introduces an additional component that may interfere with an assay, a chromatographic method or a stability measurement.
Which reagent is appropriate for a given procedure is a question for a validated institutional SOP and a documented risk assessment, not for a vendor page. We do not publish preparation procedures, concentrations or volumes.
For traceability, the reagent is part of the record: the reagent name as labelled, its stated composition including preservative and concentration, the batch or lot number, the container volume, and the expiry stated by the manufacturer.
Available analytical reports for listed materials are published in our COA library; the guides to reading a peptide COA and understanding HPLC purity explain what those documents can and cannot show.
Materials sold on this site are supplied solely for non-clinical in-vitro laboratory research. They must not be ingested, injected, inhaled, applied or otherwise administered to a human or animal.
We do not provide dosing, routes of administration, treatment guidance, cosmetic-use guidance or in-vivo protocols. Preparation, storage and handling must follow a validated institutional SOP, the material documentation and an appropriate risk assessment.
The most common scam is not a fake product. It is a real product with less peptide in the vial than the label claims, and it is invisible without testing.
Research DocumentationA non-clinical reference on catalogue identity, analytical documentation and the limits of what published evidence and batch testing establish.
Site materials are supplied solely for non-clinical in-vitro laboratory research. They must not be used in or on humans or animals. We do not provide dosing, routes of administration, treatment, cosmetic-use or in-vivo guidance. Read the legal and research-use terms.
