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Cy5 is a kind of cyanine dye with molecular weight of 656. 81. It has a maximum excitation wavelength of 649 nm and a maximum emission wavelength of 680 nm. It is red fluorescent, soluble in water, DMSO and DMF, and insoluble in most organic solvents.

Molecular Formula : C33H40N2O8S2

Molecular Weight : 656. 81

Purity :≥95%

Grade : Ultra Pure Grade

Application : Cy5 is a reactive dye for the labeling of amino-groups in peptides, proteins, and oligonucleotides. This dye requiressmall amount of organic co-solvent (such as DMF or DMSO) to be used in labeling reaction.