Carteum publishes third-party Janoshik COAs for 25 of 28 current catalog items, with batch verification and research-only handling standards built into the ordering flow. Transparency is not optional - it is our baseline.
Enter your batch code to view the Certificate of Analysis for your specific compound. Batch codes are printed on every vial label and included in your order confirmation.
Testing Methodology
Multi-stage analytical testing and published COAs help researchers verify identity, purity, and handling expectations before ordering.
High-performance liquid chromatography is the gold standard for peptide purity verification. Published COAs document purity results for tested lots and help researchers evaluate batch quality before use.
Mass spectrometry confirms molecular identity by measuring the mass-to-charge ratio of compound molecules. This verifies the compound matches its expected molecular weight and structural formula — confirming you receive exactly what the label states.
Where applicable, limulus amebocyte lysate (LAL) testing screens for bacterial endotoxin contamination. Compounds are verified to contain endotoxin levels below research-grade thresholds, ensuring suitability for sensitive laboratory applications.
Where applicable, lyophilized compounds undergo sterility testing to confirm the absence of microbial contamination. Sterile sealed vials minimize contamination risk throughout handling and reconstitution.
Available COAs document purity results, molecular identity, appearance, solubility, and lot-specific information. COAs are generated by independent third-party analytical laboratories, not in-house.
All analytical testing is performed by qualified independent third-party laboratories. We do not self-certify. Independent verification eliminates conflicts of interest and ensures unbiased results.
Quality Standards
A Certificate of Analysis typically includes the following data points for transparent batch review.
| Test Parameter | Method | Acceptance Criteria |
|---|---|---|
| Purity | HPLC (RP-C18) | ≥98.0% |
| Molecular Identity | Mass Spectrometry (ESI-MS) | Within ±0.5 Da of theoretical MW |
| Peptide Content | Nitrogen Analysis / UV | ≥80% (typical for lyophilized peptides) |
| Appearance | Visual Inspection | White to off-white lyophilized powder |
| Solubility | Dissolution Test | Clear solution upon reconstitution |
| Endotoxin | LAL Testing | <1 EU/mg |
| Sterility | Membrane Filtration | No growth detected |
| Water Content | Karl Fischer | ≤8.0% |
Supply Chain Integrity
End-to-end quality control at every stage of the supply chain.
Compounds are synthesized by qualified peptide manufacturers following good manufacturing practices. Raw material identity and purity are verified before processing.
Independent labs run full analytical panels — HPLC, MS, endotoxin, sterility. Results must meet or exceed our published acceptance criteria before the batch is approved.
Approved batches are lyophilized, filled into sterile 3ml vials, and sealed with tamper-evident labels. Each order ships in an insulated protective mailer via Kerry Express for domestic Thailand delivery in 1-2 days.