We report net peptide content, not just purity — so the milligrams you dose aren't padded with water and counter-ion. RP-HPLC purity and ESI-MS identity, on a lot-numbered COA.
Net peptide content, not just purity — RP-HPLC + ESI-MS, lot-numbered COA.
Net peptide content on every lot's COA.
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Aromatic alcohol C7H8O; antimicrobial preservative reference material
Overview
Benzyl alcohol (C7H8O) is a monosubstituted aromatic alcohol that presents as a clear, colorless liquid of density roughly 1.044-1.045 g/cm3, boiling near 204-206 °C and carrying a faint aromatic scent, with these constants re-checked against PubChem CID 244. Within research and pharmaceutical settings its principal function is as the antimicrobial agent in Bacteriostatic Water for Injection, USP, where it is present at 0.9%; that FDA-approved, DailyMed-listed preparation is used to reconstitute multi-dose lyophilized peptide powders such as BPC-157, TB-500 and semaglutide and to prolong a solution's working life after the first draw. Lyochem supplies Benzyl Alcohol as a reference material at ≥99.0% HPLC, with identity fixed to the C7H8O formula by ESI-MS and RP-HPLC establishing main-peak purity against co-eluting related substances. Because this article is a liquid rather than a lyophilized solid, water content and residual impurities are documented per lot in place of a reconstitution profile, and the certified assay reflects the characterized liquid.
Applications & buyer fit
Solvents and ancillaries are the bench-support consumables a lab pairs with a reference standard once it leaves the freezer — bacteriostatic and sterile water, isotonic saline, 0.6% acetic-acid water, and glacial acetic acid for in-house diluent prep. These are diluents and process auxiliaries rather than research targets, so the documentation is diluent / solvent-grade (component identity, sterility, endotoxin, pH / osmolality, pharmacopeia monograph) rather than the peptide HPLC + MS + sequence packet. Diluent selection follows the peptide's stability profile: acidic-pH-requiring proteins use the acetic-acid water; preservative-incompatible peptides use sterile water; preservative-compatible peptides for multi-use vials use BAC water.
Academic Laboratories
Universities, medical schools, and government research institutes qualifying a reference standard for a method-development or in vivo workflow.
Biotech R&D Groups
Preclinical biotech and pharmaceutical discovery teams sourcing characterized peptides for receptor-pharmacology, screening, and method-development campaigns.
Every release ships with its own batch-specific CoA — identity, purity, and the analytical scope agreed at quote stage, tied to the exact lot you receive.
Review a representative batch CoA before you order, so you can confirm the packet matches what your method or sponsor audit needs.
Supplied strictly as a research reagent to research institutions — not a finished dosage form and not for human administration. Buyer qualification runs at the inquiry stage.
Specifications
Documentation available on request
Regulatory note
Provided by Lyochem for laboratory and analytical reference purposes only. Although the same molecule appears in approved formulations, this material is supplied as a research chemical and is not itself intended for injection, human or animal use, or any medical application.
Selected literature
Frequently asked questions
Molecular identity is confirmed to the C7H8O formula by ESI-MS, and RP-HPLC quantifies the main peak while resolving related aromatic impurities such as benzaldehyde. Physical constants including density and boiling range are cross-referenced to the PubChem CID 244 reference values, and the measured assay is stated on the certificate.
The compound oxidizes slowly to benzaldehyde on prolonged air and light exposure, so we recommend keeping the vial tightly closed at room temperature and shielded from light. Draw with clean technique to avoid introducing water or oxidants, and re-run RP-HPLC before quantitative use if a container has been open across an extended period.
Related peptides
Preservative-free sterile-water reconstitution diluent (single-use)
0.9% benzyl-alcohol bacteriostatic reconstitution diluent (multi-use)