Source comparison
Verify CJC-1295 No DAC Purity: Laboratory vs Supplier Testing
HPLC Purity Analysis ≥98% purity via gradient elution on C18 column, 220nm UV detection, full chromatogram with retention times provided Single percentage value reported without chromatogram or method details High. Method parameters affect results; unverified
This comparison does not assign a generated winner or score.
- HPLC Purity Analysis
- ≥98% purity via gradient elution on C18 column, 220nm UV detection, full chromatogram with retention times provided
- Single percentage value reported without chromatogram or method details
- High. Method parameters affect results; unverified claims common
- Supplier certificates without chromatograms are unverifiable. Request raw data or third-party analysis
- Mass Spectrometry
- ESI-MS confirming 3647.28 ± 0.5 Da with ionization method and charge state documented
- Molecular weight listed as 'confirmed' without spectrum or ionization details
- Moderate. Substitution with similar MW peptides possible
- Mass spec data without spectra allows substitution fraud; insist on full spectrum
- Endotoxin Testing
- LAL assay showing <1 EU/mg with method sensitivity and detection limit specified
- 'Tested' or 'Compliant' without numeric value or method
- Critical. Bacterial contamination undetected by HPLC; causes experimental artifacts
- Missing endotoxin data is a red flag; injectable peptides require documented LAL results
- Batch Traceability
- Unique lot number linked to synthesis date, testing date, and storage conditions
- Generic lot number with no synthesis or expiry date
- High. Expired or improperly stored material shipped as fresh
- Demand synthesis date and storage history; peptides degrade 2–5% per year even frozen