Because tirzepatide is a complex peptide, documentation of purity and identity matters. Two analyses do the work.
Purity and identity
HPLC measures purity (e.g. ≥98%); mass spectrometry confirms the molecular mass matches the expected structure (C225H348N48O68). See HPLC vs mass spec.
On the COA
A batch-specific Certificate of Analysis should tie those results to your exact lot. Independent third-party testing adds credibility. V8 supplies tirzepatide at ≥98% HPLC with a batch COA: Tirzepatide research vials.
Research Use Only. Supplied strictly for laboratory research and development — not for human or veterinary use, consumption, or any therapeutic or diagnostic purpose. This article is research education, not usage guidance.