Axispharm provides you with high purity CAS:2107273-50-5 N-methyl-N’-methyl-O-(m-PEG4)-O’-(propargyl-PEG4)-Cy5 is an excitation/emission maximum wavelength of 649/667 nm, a cyanine derivative containing an alkynyl group, which enables Click Chemistry to attach dark and photostable cyanine fluorophores to a wide variety of molecules.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.