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  4. Fluorescent Dye

Fluorescent Dye

Fluorescence is a phenomenon of photoluminescence in luminescence. When an atom is irradiated by light, some electrons around the nucleus jump from their original orbitals to higher energy orbitals under the influence of light energy, i.e., from the ground state to the first or second excited single-line state, etc. Due to the instability of the first or second excited singlet state, the electron returns from the excited singlet state to the ground state accompanied by released energy, resulting in fluorescence.

Fluorescent dyes can be covalently bound or physically adsorbed in the structure of the substance. The fluorescence properties allow for the characterization, localization and quantitative analysis of the labeled object. Fluorescent dyes have shown great potential for the detection of proteins, nucleic acids, cells, and immunoassays, attributed to the advantages in non-radioactive contamination, simple experimental operation and easy observation.

Fluorescent dyes have penetrated many fields such as pharmacology, physiology, environmental science, and information science, as well as functional studies of proteins and drug screening.

Cat. No. Product Name Effect Purity Chemical Structure
  • HY-D2798B
    FITC-PEG-SH (MW 5000)
    FITC-PEG-SH (MW 5000) is a fluorescent dye composed of polyethylene glycol (PEG), FITC (HY-66019) and a sulfhydryl (SH). FITC-PEG-SH (MW 5000) can be used for fluorescent labeling and imaging.
    FITC-PEG-SH (MW 5000)
  • HY-D2558
    Cy5.5-PEG-SH (MW 5000)
    Cy5.5-PEG-SH (MW 5000) is a fluorescent labeling reagent that combines Cy5.5 (HY-D0924) fluorescent dye, polyethylene glycol (PEG) and sulfhydryl (SH) derivatives, and is suitable for molecular coupling. SH is highly reactive and can react with a variety of functional groups (such as maleimide) to form stable thioether bonds.
    Cy5.5-PEG-SH (MW 5000)
  • HY-D2424
    Disperse Red 343
    Disperse Red 343 is an azo dye widely used in the textile industry for dyeing polyester fabrics.
    Disperse Red 343
  • HY-D2854B
    FITC-PEG-CL (MW 2000)
    FITC-PEG-CL (MW 2000) is a fluorescent dye composed of FITC (HY-66019), PEG and chlorine (-Cl). The chlorine group is an electrophilic active group that can be used for nucleophilic substitution reactions and facilitate subsequent chemical modification (Ex/Em = 488/525 nm).
    FITC-PEG-CL (MW 2000)
  • HY-D2416S
    JFX650
    JFX650 is a red fluorescent deuterated dye with a maximum excitation emission wavelength of 650/667 nm. JFX650 is suitable for live cell imaging.
    JFX650
  • HY-D0545
    Disperse red 91
    Disperse red 91 is a red dye derived from anthraquinone. It is used in plastics, textiles and cosmetics.
    Disperse red 91
  • HY-D0389
    Acid Brown 14
    Acid Brown 14 is a brown dye whose staining effects can be removed by the electrocoagulation (EC) process.
    Acid Brown 14
  • HY-D0589
    Disperse green 9
    Disperse green 9 is a multifunctional dye. Dyes are important tools in biological experiments. They can help researchers observe and analyze cell structures, track biomolecules, evaluate cell functions, distinguish cell types, detect biomolecules, study tissue pathology and monitor microorganisms. Their applications range from basic scientific research to clinical A wide range of diagnostics. Dyes are also widely used in traditional fields such as textile dyeing, as well as in emerging fields such as functional textile processing, food pigments and dye-sensitized solar cells.
    Disperse green 9
  • HY-D0576
    Pigment orange 62
    Pigment orange 62 is a multifunctional dye. Dyes are important tools in biological experiments. They can help researchers observe and analyze cell structures, track biomolecules, evaluate cell functions, distinguish cell types, detect biomolecules, study tissue pathology and monitor microorganisms. Their applications range from basic scientific research to clinical A wide range of diagnostics. Dyes are also widely used in traditional fields such as textile dyeing, as well as in emerging fields such as functional textile processing, food pigments and dye-sensitized solar cells.
    Pigment orange 62
  • HY-D0509
    C.I. Acid yellow 172
    C.I. Acid yellow 172 is an acidic yellow dye that can be adsorbed and removed by bentone.
    C.I. Acid yellow 172
  • HY-D2489
    Cy5-tetrazine
    Cy5-tetrazine is a fluorescent dye. Cy5-tetrazine is a CY5 (HY-D0821) derivative contains a tetrazine moiety. Cyanine5.5 tetrazine can be used for in vivo imaging and low background applications. Cy5-tetrazine is a click chemistry reagent, it contains a Tetrazine group that can undergo an inverse electron demand Diels-Alder reaction (iEDDA) with molecules containing TCO groups.
    Cy5-tetrazine
  • HY-W327027
    7-(2,4-Dinitrophenoxy)-4-methyl-2H-chromen-2-one
    7-(2,4-Dinitrophenoxy)-4-methyl-2H-chromen-2-one (Compound 1) is a fluorescent probe for the detection of hydrogen sulfide (H2S). 7-(2,4-Dinitrophenoxy)-4-methyl-2H-chromen-2-one has a low detection limit (4×10-6 mol/L), good selectivity and high sensitivity. 7-(2,4-Dinitrophenoxy)-4-methyl-2H-chromen-2-one shows almost no cytotoxicity at concentrations of 150 µg/mL. 7-(2,4-Dinitrophenoxy)-4-methyl-2H-chromen-2-one has the excitation peak of 331 nm, and the emission peak about 385 nm in DMSO solvent. Upon the addition of increasing amounts of HS-, the fluorescence intensity increases obviously at about 392 nm.
    7-(2,4-Dinitrophenoxy)-4-methyl-2H-chromen-2-one
  • HY-D0397
    C.I. Direct Violet 9
    C.I. Direct Violet 9 is a multifunctional dye. Dyes are important tools in biological experiments. They can help researchers observe and analyze cell structures, track biomolecules, evaluate cell functions, distinguish cell types, detect biomolecules, study tissue pathology and monitor microorganisms. Their applications range from basic scientific research to clinical A wide range of diagnostics. Dyes are also widely used in traditional fields such as textile dyeing, as well as in emerging fields such as functional textile processing, food pigments and dye-sensitized solar cells.
    C.I. Direct Violet 9
  • HY-D0659
    Acid brown 58
    Acid brown 58 is a brown dye whose staining effects can be removed by the electrocoagulation (EC) process.
    Acid brown 58
  • HY-124013
    NBDA
    NBDA (4-(α-N-L-alanine)-NBD) is a structural and functional analogue of the 2,4-dinitrophenyl group (DNP). NBDA can be used to detect and characterize antinitroaromatic antibodies, even in crude preparations, and possibly on cell surfaces.
    NBDA
  • HY-D2248
    ICG-TCO
    ICG-TCO is a fluorescent dye coupled by Indocyanine Green (ICG) and TCO. ICG-TCO can be used for detection and visualization of tetrazine-containing molecules.
    ICG-TCO
  • HY-D2800C
    FITC-PEG-MAL (MW 5000)
    FITC-PEG-MAL (MW 5000) is a fluorescent dye composed of polyethylene glycol (PEG), FITC (HY-66019) and Maleimide (HY-W007324) (MAL). FITC-PEG-MAL (MW 5000) can be used for fluorescent labeling and imaging.
    FITC-PEG-MAL (MW 5000)
  • HY-W923132
    Fluorescein O-acrylate
    Fluorescein O-acrylate (Acryloyloxy fluorescein) is a highly efficient fluorescent monomer that exhibits strong quantum yield in aqueous solutions, with its excitation and emission wavelengths situated within the visible light spectrum. This versatile monomer can be copolymerized with various compounds, including styrene, and acrylamide, enhancing its ability to bond with macromolecules.
    Fluorescein O-acrylate
  • HY-W806655
    Cy3.5 carboxylic acid
    Cy3.5 carboxylic acid is a fluorophore featuring a carboxylic acid. The carboxylic acid is readily attacked by amines to form a stable amide bond. Cy3.5 is a cyanine dye with excitation and emission maxima at 576 nm and 603 nm respectively.
    Cy3.5 carboxylic acid
  • HY-D0689
    Pigment yellow 168
    Pigment yellow 168 is a disazomethine dye with solid-state fluorescence.a biologically active chemical.
    Pigment yellow 168
Cat. No. Product Name / Synonyms Application Reactivity