Reconstitution Water

Contents Sterile water Form / storage Clear liquid in sealed vial; store at room temperature, protect from light; discard if cloudy or past expiry Purity ≥98% — see lot COA CAS 7732-18-5 (water) Molecular formula H₂O (bacteriostatic variant also contains benzyl alcohol, C7H8O, as preservative) Molecular weight 18.02 g/mol (water) Sizes $9.99–$14.99 tier (per your listing) Testing Identity (UV/Vis λmax), purity, assay (Beer-Lambert), heavy metals, microbial (TAMC/TYMC) COA Batch-specific — view on this page Research background Reconstitution water is a sterile, particulate-free aqueous solvent whose role is purely physical — it dissolves lyophilized research powders so they can be measured, diluted, and handled. The bacteriostatic form contains a small amount of benzyl alcohol that limits microbial growth and allows multiple accesses to a vial; plain sterile water has no preservative and is single-use. It contributes no biological activity of its own. Choice between bacteriostatic and plain sterile water typically depends on solvent compatibility and whether multi-use access is required. Research applications Reconstituting lyophilized research peptides into stock solutions Serial dilution and preparation of working concentrations General sterile-solvent benchtop use Quality & documentation Every lot is tested by an independent third-party laboratory before it enters the catalog. Testing covers identity (characteristic UV/Vis λmax matched to a reference standard), percent purity (≥98%, correlation-coefficient method), quantitative assay (Beer-Lambert, ≥95% of label claim), heavy metals (total ≤150 ppb — Pb, Cd, Hg, Ni, Fe, Co), and microbial limits (TAMC/TYMC). Each order ships with the Certificate of Analysis matching its lot number. References USP monographs “Sterile Water for Injection” and “Bacteriostatic Water for Injection.” Spec ref: PubChem CID 962. For laboratory and research use only. Not for human or veterinary use.