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BPC-157
TB-500
Semaglutide
Tirzepatide
CJC-1295
Ipamorelin
HGH Fragment 176-191
GHK-Cu
PT-141
AOD-9604
Hexarelin
Melanotan II
A COA is an official document from an independent, accredited laboratory confirming the identity, purity, and safety of a research compound. RexPeps requires a full COA for every batch before it ships. Never estimated, never repeated from a prior lot.
Purity by HPLC-UV
Reverse-phase high-performance liquid chromatography quantifies compound purity, confirming it meets or exceeds stated specifications.
Identity by Mass Spec
Mass spectrometry analysis confirms molecular identity with precision, detecting counterfeits or substitutions that HPLC alone cannot catch.
Safety Screening
ICP-MS heavy metal testing and GC-MS residual solvent analysis verify the compound is free from harmful contaminants per ICH Q3C limits.