2,5-dioxopyrrolidin-1-yl 1-(2,5-dioxo-2H-pyrrol-1(5H)-yl)-3,6,9,12,15,18-hexaoxahenicosan-21-oate(Mal-PEG6-NHS ester), 95%

*This document is like a lab demo—an example Certificate of Analysis (COA) that showcases what a COA looks like but may not match the latest batch in all its glory. Think of it as a chemistry experiment: close, but not quite the final reaction!