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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-D0382
    Disperse Orange 30
    Disperse Orange 30 is an orange-orange dye commonly used for fiber dyeing.
    Disperse Orange 30
  • HY-D0101A
    Fluorescein-diphosphat ammonium
    Fluorescein-diphosphat (ammonium) 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.
    Fluorescein-diphosphat ammonium
  • HY-D2764
    Difluorocarboxyfluorescein cadaverine, 5-isomer
    Difluorocarboxyfluorescein cadaverine, 5-isomer is a carbonyl reactive building block used to modify carboxylic groups in the presence of activators (e.g. EDC, or DCC) or activated esters (e.g. NHS esters) through a stable amide bond.
    Difluorocarboxyfluorescein cadaverine, 5-isomer
  • HY-D2498
    Cy7 maleimide
    Cy7 maleimide is a fluorescent dye containing a Maleimide (HY-W007324) functional group. Maleimide can be used to label thiol groups on antibodies, proteins and peptides.
    Cy7 maleimide
  • HY-D0622
    Reactive Green 19
    Reactive Green 19 is common textile dyes that can be adsorbed onto single-walled carbon nanotubes (SWCNTs) through electrostatic interactions, allowing the separation of residual dyes.
    Reactive Green 19
  • HY-D2138
    Cy3-PEG7-Azide
    Cy3-PEG7-Azide is a Cyanine 3 (Cy3) (HY-D0822) dye derivative containing 7 PEG units. Cy3-PEG7-Azide contains an azide group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing alkyne groups. It can also undergo ring strain-promoted alkyne-azide cycloaddition (SPAAC) with molecules containing DBCO or BCN groups.
    Cy3-PEG7-Azide
  • HY-D2854E
    FITC-PEG-CL (MW 10000)
    FITC-PEG-CL (MW 10000) 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 10000)
  • HY-D0655
    Reactive red 24
    Reactive red 24 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.
    Reactive red 24
  • HY-172721
    Cy3B maleimide
    Cy3B maleimide is a mono-reactive dye containing maleimide group, which can selectively and efficiently attach Cyanine3 fluorophore (an analog of Cy3) to proteins and peptides containing cysteine residues, as well as to other thiolated molecules (such as thiol-containing oligonucleotides). Cy3B is an improved version of Cy3 dyes with significantly increased fluorescence quantum yield and photostability.
    Cy3B maleimide
  • HY-D2261
    BODIPY-cholesterol conjugate-1
    BODIPY-cholesterol conjugate-1 (compound 5) is a BODIPY-cholesterol conjugate. BODIPY-cholesterol conjugate-1 is a useful probe for simultaneous visualization of intracellular cholesterol pools and for monitoring cholesterol efflux from cells to extracellular acceptors. (λex 541 nm, λem 615 nm).
    BODIPY-cholesterol conjugate-1
  • HY-W112090
    Palladium meso-tetra(pentafluorophenyl)porphyrin
    Palladium meso-tetra(pentafluorophenyl)porphyrin (PdTFPP) is a phosphorescent dye, derived from palladium(II), that serves as an effective singlet oxygen sensitizer due to its fluorine atom content, offering excellent photostability and resistance to oxidation.
    Palladium meso-tetra(pentafluorophenyl)porphyrin
  • HY-W800702
    BP Fluor 555 azide
    BP Fluor 555 Azide is a water-soluble, bright orange-fluorescent dye with excitation ideally suited for the 532 nm or 555 nm laser lines and visualized with TRITC (tetramethylrhodamine) filter sets. BP Fluor 555 conjugates of antibodies, peptides, and proteins are pH insensitive from pH 4 to pH 10. AF 555 conjugates ideally suited for detection of low abundance targets. BP Fluor 555 Azide can be reacted with terminal alkynes via a copper-catalyzed click reaction (CuAAC). It also reacts with strained cyclooctyne via a copper-free “click chemistry” reaction to form a stable triazole and does not require Cu-catalyst or elevated temperatures. The brightness and photostability of this dye are best suited to direct imaging of low-abundance targets.
    BP Fluor 555 azide
  • HY-D2466
    Cy3 Dextran (MW 70000)
    Cy3 Dextran (MW 70000) is a fluorescent labeling reagent that combines Cy3 (HY-D0822) fluorescent dye and Dextran (HY-112624). The Cy3 fluorophore is commonly used in applications such as immunolabeling, nucleic acid labeling, fluorescence microscopy, and flow cytometry. Cy3 has an emission maximum around 562-570 nm. Dextran has an inhibitory effect on thrombocyte aggregation and coagulation factors and is used as a plasma volume expander.
    Cy3 Dextran (MW 70000)
  • HY-W800698
    BP Fluor 430 alkyne
    BP Fluor 430 Alkyne is a green-fluorescent alkyne-activated probe routinely used for imaging of moderate to high abundance azide-containing biomolecules. BP Fluor 430 Alkyne reacts with azides via a copper-catalyzed click reaction (CuAAC) to form a stable triazole linker. BP Fluor 430 is a bright, photostable, green-fluorescent probe optimally excited near 430 nm. This probe is water-soluble and its fluorescence is pH independent over a wide pH range.
    BP Fluor 430 alkyne
  • HY-D2329
    Fluorescein-PEG4-NHS ester
    Fluorescein-PEG4-NHS ester is a colorimetric probe formed by the reaction of adipic acid dihydrazide and fluorescein isothiocyanate.
    Fluorescein-PEG4-NHS ester
  • HY-D0441
    C.I. Pigment red 23
    C.I. Pigment red 23 is the most important colorant used to add color or change the color of something and is chemically essentially unaffected by the carrier or medium into which it is incorporated. It can be widely used in textile, medicine, food, cosmetics, plastics, paint, ink, photography and paper industries.
    C.I. Pigment red 23
  • HY-D2766
    DyLight 550 NHS ester
    BP Light 550 NHS ester is a vibrant orange-to-red fluorochrome with better performance than other rhodamine derivatives, including BP Fluor 555, TRITC, and Cy3 dye for fluorescent applications. The high water solubility of BP Light 550 means that a high dye-to-protein ratio can be attained without causing precipitation of the conjugates.
    DyLight 550 NHS ester
  • HY-158617
    4-Methyl-7-(4-nitrophenoxy)-2H-chromen-2-one
    4-Methyl-7-(4-nitrophenoxy)-2H-chromen-2-onee is a fluorescent Coumarin (HY-N0709) derivative (Ex/Em=323/445 nm).
    4-Methyl-7-(4-nitrophenoxy)-2H-chromen-2-one
  • HY-172164C
    FITC-lysine-dextran (MW 500kDa)
    FITC-lysine-dextran, 500kDa is a dextran with lysine coupling with a fluorescent group FITC (HY-66019). Lysine-dextran exhibits higher Glu-plasminogen binding ability than dextran alone.
    FITC-lysine-dextran (MW 500kDa)
  • HY-D0610
    Disperse Violet 33
    Disperse Violet 33 is a violet dye commonly used for fiber dyeing.
    Disperse Violet 33
Cat. No. Product Name / Synonyms Application Reactivity