GHK Cu Copper Tripeptide 1 Research Reagent Influence of Coordination Geometry upon Copper(II I) Redox Potentials. Physical Parameters for Twelve Copper Tripodal Ligand Complexes Inorganic Chemistry Buy GHK Cu Exceptional 99%+ Purity Third Party COA Included China Copper Peptide(GHK Cu) CAS:89030 95 5 Manufacturers Free Sample Alfa Chemical GHK Cu 50 mg Copper Peptide Research Grade PRG Your copper peptide product should be this exact blue. If it isn't, you already have your answer. GHK Cu is blue because of coordination chemistry, not dye. The Cu ion at the center