Verification
Every lot, independently verified.
Every batch we ship is assayed by an independent third-party laboratory for identity and purity before the lot is offered for sale.
Methodology
How we test
HPLC purity assay
Reverse-phase HPLC quantifies purity to ≥98% on every lot. Chromatograms and peak integration tables are attached to the COA.
Mass spectrometry confirmation
ESI-MS or MALDI-TOF confirms the peptide identity against expected molecular weight before any lot is released.
Endotoxin and water content
LAL endotoxin and Karl Fischer water content are run on lots intended for solution preparation.
Sample certificate
What a certificate looks like
CHRONOPEPTIDE
Research-Grade Peptides · Verified by Batch
Document Type
Certificate of Analysis
Tirzepetide 15 mg
Lot #24-118 · Reference Sample
- Testing Laboratory
- Janoshik Analytical
- Date of Analysis
- 2026-04-22
- Methodology
- HPLC-UV · ESI-MS · LAL
- Quality Standard
- ISO/IEC 17025 reference
Analytical Results
| Parameter | Specification |
|---|---|
| Identity | Confirmed (ESI-MS) |
| Purity (HPLC) | 99.4 % |
| Water content | 3.1 % |
| Endotoxin | < 0.5 EU/mg |
| Appearance | White lyophilized powder |
Authorized Signatory
Quality Assurance · Chronopeptide
Activity
Recent batches
| Lot | Peptide | Lab | Tested | Purity | COA |
|---|---|---|---|---|---|
| No published lots yet. | |||||
- No published lots yet.