Fluorescent Dyes for Bioconjugation and Detection Applications
Fluorescent Dyes
High-purity fluorescent dyes for reliable labeling in imaging and flow cytometry
emp BIOTECH’s Fluorescent Dyes portfolio offers high-purity, well-characterized dye molecules for precise and efficient bioconjugation, fluorescence imaging, and flow cytometry (FACS) applications. Our dyes are available in thiol-reactive and amine-reactive formats, suitable for labeling proteins, oligonucleotides, and other biomolecules.
Choose from a comprehensive selection of dyes, grouped by excitation range to support a variety of detection systems:
Excitation 350–500 nm – Green-fluorescent dyes including fluorescein and FITC derivatives
Excitation 500–600 nm – Orange and red-fluorescent rhodamines and TAMRA-based labels
Excitation 600–700 nm – Far-red fluorescent dyes such as ROX and X-rhodamine
Fluorescent Dyes
Fluorescein-5/6-isothiocyanate (5/6-FITC)
Amine-reactive fluorescein dye marker for fluorescence labeling, especially for labeling of biomolecules (Abs: 494 nm, Em: 518 nm).
5-Carboxyfluorescein NHS ester, single isomer (5-FAM-SE)
Amine-reactive fluorescein dye marker for fluorescence labeling, especially for labeling of biomolecules (Abs: 495 nm, Em: 519 nm).
5-Iodoacetamidofluorescein (5-IAAF)
Thiol-reactive fluorescein derivative for fluorescence derivatization, especially for labeling of cysteines and thiol-modified oligos.
5/6-Carboxyfluorescein NHS ester, mixed isomers (5/6-FAM-SE)
Amine-reactive fluorescein dye marker for labeling of biomolecules (Abs: 496 nm, Em: 517 nm).
6-Carboxyfluorescein NHS ester, single isomer (6-FAM-SE)
Amine-reactive fluorescein dye marker for fluorescence labeling, especially for labeling of biomolecules (Abs: 497 nm, Em: 519 nm).
Fluorescein-5-maleimide (5-F-MI)
Thiol-reactive fluorescein derivative for fluorescence derivatization, especially for labeling of cysteines and thiol-modified oligos.
5-Carboxyfluorescein, single isomer (5-FAM) (99+%, high purity)
High purity, non-activated fluorescein dye marker for fluorescence labeling, especially for labeling of biomolecules (Abs: 493 nm, Em: 517 nm).
5/6-Carboxyfluorescein, mixed isomers (5/6-FAM) (99+%)
High purity, non-activated fluorescein dye marker for fluorescence labeling, especially for labeling of biomolecules (Abs: 496 nm, Em: 517 nm).
6-Carboxyfluorescein, single isomer (6-FAM) (99+%, high purity)
High purity, non-activated fluorescein dye marker for fluorescence lableing, especially for labeling of biomolecules (Abs: 493 nm, Em: 514 nm).
5/6-Carboxytetramethylrhodamine, mixed isomers (5/6-TAMRA)
Non-activated rhodamine dye marker for fluorescence labeling, especially for labeling of biomolecules (Abs: 548 nm, Em: 569 nm).
6-Carboxy-X-rhodamine NHS ester, single isomer (6-ROX-SE)
Amine-reactive rhodamine dye marker for fluorescence labeling, especially for labeling of biomolecules (Abs: 584 nm, Em: 599 nm).
5-Carboxytetramethylrhodamine NHS ester, single isomer (5-TAMRA-SE)
Amine-reactive rhodamine dye marker for fluorescence labeling, especially for labeling of biomolecules (Abs: 554 nm, Em: 577 nm).
Texas Red NHS ester, single isomer (TR-4-SE)
Amine-reactive rhodamine dye marker for fluorescence labeling, especially for labeling of biomolecules (Abs: 579 nm, Em: 591 nm).
6-Carboxytetramethylrhodamine NHS ester, single isomer (6-TAMRA-SE)
Amine-reactive rhodamine dye marker for fluorescence labeling, especially for labeling of biomolecules (Abs: 554 nm, Em: 577 nm).
5-Carboxytetramethylrhodamine, single isomer (5-TAMRA)
Classic FRET acceptor, non-activated (Abs: 548 nm, Em: 570 nm).
5-Carboxy-X-rhodamine, single isomer (5-ROX)
Non-activated red fluorescent dye label (Abs: 576 nm, Em: 601 nm).
6-Carboxytetramethylrhodamine, single isomer (6-TAMRA)
Classic FRET acceptor, non-activated (Abs: 549 nm, Em: 572 nm).
5/6-Carboxytetramethylrhodamine NHS ester, mixed isomers (5/6-TAMRA-SE)
Amine-reactive rhodamine dye marker for fluorescence labeling, especially for labeling of biomolecules (Abs: 554 nm, Em: 577 nm).
5/6-Carboxy-Erythrosin B NHS ester, mixed isomers (EryB-SE)
Amine-reactive singlet-oxygen generator and dye marker labeling of biomolecules (Abs: 527 nm).
Ferrocene-amidopentyl carboxylic acid NHS ester (Ferrocene-C6-SE)
Amine-reactive ferrocene redox marker for electro-active labeling, designed especially for labeling of biomolecules. Contains 6-carbon linker.
Anthraquinone-2-amidopentyl carboxylic acid NHS ester (AQI-C6-SE)
Amine-reactive anthraquinone redox marker for electro-active labeling, designed especially for labeling of biomolecules. Contains 6-carbon linker.
Monocarboxymethylene Blue NHS ester (MCMB-SE)
Amine-reactive methylene blue redox marker for electro-active labeling, designed especially for labeling of biomolecules.
5/6-Carboxy-Erythrosin B
Non-activated singlet-oxygen generator and dye marker for labeling of biomolecules (Abs: 527 nm).
6-(3-Aminopropyl)-amidofluorescein, single isomer (6-Aminopropyl-FAM)
Non-activated yellow fluorescent dye label, with three-carbon linker and free amino group for derivatization.
5/6-(3-Aminopropyl)-amido-tetramethylrhodamine (5/6-Aminopropyl-TAMRA)
Non-activated rhodamine dye marker with three-carbon linker and free amino group for derivatization.
6-Carboxy-4′,5′-dichloro-2’7′-dimethoxyfluorescein, single isomer (6-JOE)
Non-activated orange fluorescent dye label
5-Carboxy-4′,5′-dichloro-2’7′-dimethoxyfluorescein, single isomer (5-JOE)
Non-activated orange fluorescent dye label