Chromeo Dye Listing

Chromeo™ dyes are a family of high-performance fluorescent dyes designed for efficient labeling of biomolecules including DNA, RNA, PNA, peptides, proteins, and antibodies. These fluorophores offer excellent brightness, good photostability, and broad spectral coverage, making them suitable for fluorescence microscopy, confocal imaging, flow cytometry, FISH, and molecular biology research. Chromeo™ dyes are available in multiple reactive formats to support custom oligonucleotide conjugation and bioconjugation applications.

Chromeo™ Dye	Ex (nm)	Em (nm)	Recommended Laser	Emission Color	Typical Applications
Chromeo™ 488	488	517	488 nm	Green	Immunofluorescence, flow cytometry, ELISA, FRET, fluorescence microscopy
Chromeo™ 494	494	628	488 nm	Red	Large Stokes shift labeling, multiplex immunofluorescence, flow cytometry, FRET
Chromeo™ 505	505	526	488/514 nm	Green	Biomolecule labeling, fluorescence microscopy, flow cytometry
Chromeo™ 546	545	561	532/543/561 nm	Orange	Immunofluorescence, high-content screening, ELISA, FRET assays
Chromeo™ 642	642	660	633/640/647 nm	Far Red	Far-red fluorescence labeling, flow cytometry, immunofluorescence, microscopy

Trademark Notice: Chromeo™ is a trademark of Active Motif, Inc. Bio-Synthesis provides custom oligonucleotide labeling with compatible Chromeo™ fluorescent dyes and is not affiliated with or endorsed by Active Motif, Inc.