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The Catalog

Reference Peptides

Every vial third-party tested to ≥99% purity. Certificate of Analysis delivered with every order.

The Science

Every batch, independently verified.

HPLC purity, ESI-MS identity, endotoxin screen. Three instruments, one batch, one certificate — shipped with every order.

Certificate of Analysis
Batch PQ-24B-0417
mAU
Reverse-phase HPLC · Waters Symmetry C18 · gradient 10→95% MeCN · 214 nm detection
intensity
ESI-MS positive mode · Waters SQ Detector 2 · calibrated leucine enkephalin lock-spray
0.012 EU/mg
Method LAL kinetic chromogenic
Analyst A. Huang · QC-03
Result PASS · 42× below limit
Limulus Amebocyte Lysate · kinetic chromogenic · USP <85> compliant
Verified · 17 Apr 2026
Signed M. Alvaro, Ph.D. · QC Lead
0.00% Main product · HPLC-UV
  • HPLC purity
    Reverse-phase C18, UV-214 nm. Reports main peak area + named impurities ≥ 0.1%.
    ≥ 99%
  • ESI-MS identity
    Molecular ion + isotope envelope matched against calculated mass within 0.1 Da.
    Matched
  • Endotoxin · LAL
    Kinetic chromogenic assay to USP <85>. Below limit by ≥ 40× on current lots.
    < 0.05 EU/mg
  • Lot traceability
    Every vial carries a batch ID tied to synthesis, raw materials, and operator sign-off.
    End-to-end
Read the research-use policy
Quality

Reference-grade in every vial.

From sourcing to shipping, every step is documented. Lyophilized under nitrogen, sealed for cold-chain integrity, and traceable by batch.