IR 650 DBCO is a fluroescent molecule with a terminal propargyl group. The DBCO groups is commonly used for copper-free Click Chemistry reactions due to its strain promoted high energy. IR 650 DBCO very hydrophilic, water-soluble far-red fluorescent dye that has a maximal absorption of 651 nm and emission at 668 nm. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.