Halogen driven modulation of coordination geometry and electronic properties in copper complexes: Insights from comprehensive structural and computational studies ScienceDirect 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 China Copper Peptide(GHK Cu) CAS:89030 95 5 Manufacturers Free Sample Alfa Chemical GHK Cu as a multifunctional copper peptide: synthesis routes, process engineering and emerging applications Systems Microbiology and Biomanufacturing Springer Nature Link Ghk Cu Copper Peptide: Uncover Its Full Potential