QSC COA Verification — Janoshik Analytical
All QSC (Qingdao Sigma Chemical) research compounds are independently tested by Janoshik Analytical Laboratories — a third-party analytical chemistry laboratory. Every batch produces a Certificate of Analysis (COA) that is publicly verifiable online by batch number.
Verify a QSC Batch COA
Enter any QSC batch number at QSC Peptide Lab to access the full Janoshik COA report.
Verify COA at QSCPeptideLab.com →What the COA Confirms
| Test | Method | QSC Standard |
|---|---|---|
| Compound Identity | ESI-MS (Electrospray Ionisation Mass Spectrometry) | Exact mass match to reference |
| Purity | Reverse-phase HPLC (High-Performance Liquid Chromatography) | ≥99% area purity |
| Batch Consistency | Comparative HPLC vs internal reference | Per-batch verified |
| Physical Appearance | Visual inspection | Lyophilised white/off-white powder |
| Public Verification | Online batch number lookup | Available at qscpeptidelab.com |
About Janoshik Analytical Laboratories
Janoshik Analytical Laboratories is an independent analytical chemistry laboratory specialising in peptide testing and verification. QSC uses Janoshik as its exclusive third-party testing partner to ensure each batch COA is produced by a lab with no commercial interest in the results.
What ≥99% HPLC Purity Means
HPLC purity is measured as the percentage of the target compound by area in a UV chromatogram at the appropriate detection wavelength. ≥99% means <1% of the total peak area is attributed to impurities, degradation products, or synthesis by-products. This is the highest commercially available purity standard for research-grade peptides.
QSC compounds use Fmoc solid-phase peptide synthesis (SPPS) at the Qingdao manufacturing facility, then undergo HPLC purification before lyophilisation and vial filling. The COA is generated after final purification on each specific batch.