(±)-H3RESCA-TFP(Cat No.:I045896)is a heterobifunctional chemical probe incorporating a hydroxylamine-based RESCA moiety for site-specific protein labeling and a tetrafluorophenyl (TFP) ester group for efficient conjugation to amines. The racemic mixture (±) enhances versatility in biochemical applications. Its design enables stable and bioorthogonal linkage formation, making it highly useful in protein engineering, bioconjugation, and drug delivery studies. (±)-H3RESCA-TFP facilitates construction of antibody–drug conjugates, probes for imaging, and targeted therapeutics. It provides researchers with a flexible tool for exploring chemical biology, proteomics, and advanced therapeutic development.