3-(2-Pyridyldithio)propionic Acid N-Hydroxysuccinimide Ester (SPDP Crosslinker) extrapure, 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!