01 Required
Quantifies the target peptide against certified reference material and resolves truncation, deletion, and oxidation impurities.
- Method
- Reverse-phase HPLC with UV/DAD detection
- Specification
- ≥ 99.0% area purity
Analytical Standards
Eight assays. Every lot.
We don't test a representative batch and extrapolate. Each lot number in the catalog carries its own full analytical panel, performed by accredited third-party laboratories.
02 Required
Confirms net peptide content so the labeled mass reflects actual peptide, not counter-ion or residual solvent mass.
- Method
- Acid hydrolysis with post-column derivatization
- Specification
- Within ±10% of theoretical
03 Required
Verifies molecular weight to confirm that the sequence synthesized is the sequence ordered.
- Method
- Electrospray ionization mass spectrometry
- Specification
- Observed mass matches theoretical
04 Required
A second, orthogonal identity confirmation that catches co-eluting species HPLC alone can miss.
- Method
- Matrix-assisted laser desorption ionization
- Specification
- Single dominant molecular ion
05 Required
Screens for lead, arsenic, cadmium, and mercury introduced by reagents or equipment.
- Method
- Inductively coupled plasma mass spectrometry
- Specification
- Below USP <232> limits
06 Required
Filtered material is incubated in two media across aerobic and anaerobic conditions for the full 14-day period.
- Method
- Membrane filtration, 14-day incubation
- Specification
- No growth
07 Required
Detects gram-negative endotoxin at picogram sensitivity — the contaminant most likely to confound in vitro results.
- Method
- Kinetic chromogenic Limulus amebocyte lysate
- Specification
- < 0.5 EU/mg
08 Required
No lot ships until an independent reviewer signs every result onto the batch certificate of analysis.
- Method
- Second-analyst review at an ISO/IEC 17025 laboratory
- Specification
- All specifications met
Check the panel behind your vial.
Enter the lot number printed on the label to pull the signed certificate of analysis for that exact batch.
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