Sulfo-Cyanine7.5 dicarboxylic acid is a bifunctional near infrared fluorescent dye with two carboxylic acid groups.
The reagent is useful as a cross-linker that is NIR emitting. The carboxylic acid groups can be activated by carbodiimide chemistry.
AxisPharm offers 4000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.