
Bacteriostatic Water
COA 99.8%Large volume · 10 mL × 2 – 30 mL × 3
1 compound · priced per vial · lot COAs in our public library
Large Volume Research holds the sterile diluent supplied alongside the lyophilised peptides in the catalog: bacteriostatic water, which is sterile water containing 0.9% benzyl alcohol as a preservative, in 3 mL, 10 mL and 30 mL vials. It is a laboratory reagent for preparing solutions from dry powder, listed for research use only, and nothing about it is specific to any compound elsewhere in the catalog. The lyophilised material it is paired with at the bench stays sealed in its own vial until a solution is actually prepared.
A diluent is characterised differently from a peptide. There is no sequence or molecular weight to confirm; identity is the stated composition, sterile water with 0.9% benzyl alcohol by volume, and the properties that matter for a solvent are clarity, the absence of visible particulates, preservative content and pH. What a given certificate reports is listed on the certificate itself; do not assume a panel that is not printed there. The product page states the composition and the vial volumes so that what arrives can be checked against what was listed.
An independent US laboratory tests the lots it receives, and the resulting Certificate of Analysis is published in the COA library for the lots it covers and linked from the product page. A certificate for a diluent names the product, the vial volume and the batch, and lists the tests the laboratory performed on that sample. Because the 10 mL and 30 mL vials are separate samples at the laboratory even when they share a lot number, match the vial volume printed on the report to the vial you receive; a report for one volume does not stand in for another.
Keep the vial sealed and upright at the storage condition printed on the label or the lot's certificate, away from direct light. The benzyl alcohol preservative is what allows the contents to be sampled more than once; record the date of first opening on the label and discard the vial if the contents turn cloudy or show particulates. Once dry powder has been dissolved in it, the resulting solution takes on the stability of the peptide, not of the water, and belongs to the peptide's storage note.
Start with the laboratory's name and the sample it names, then the batch, then the tests-performed table. For a diluent the useful lines are the ones that describe the solution itself; a missing line is not a failed test, it is a test that was not run on that sample. If the report you open names a different volume or batch than the vial in hand, contact us with both numbers before the vial goes into an experiment, and use the laboratory's own verification link in the library entry where the lab provides one.