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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-120666
    TAMRA-PEG4-Alkyne
    TAMRA-PEG4-Alkyne is a dye derivative of TAMRA (HY-135640) containing 4 PEG units. TAMRA-PEG4-Alkyne contains Alkyne groups and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.
    TAMRA-PEG4-Alkyne
  • HY-D2120
    Cy3-PEG3-endo-BCN
    Cy3-PEG3-endo-BCN is a dye derivative of Cyanine 3 (Cy3) (HY-D0822) containing 3 PEG units. Cy3-PEG3-endo-BCN contains the lyophilic bidentate macrocyclic ligand BCN, which can further synthesize macrocyclic complexes. In click chemistry, endo-BCN can react with molecules containing azide groups to form stable triazoles in the absence of catalysts.
    Cy3-PEG3-endo-BCN
  • HY-D1499
    Fluorescent red 610
    Fluorescent red 610 is a fluorescent dye with an excitation peak at 590 nm and an emission peak at 610 nm.
    Fluorescent red 610
  • HY-D1930
    ATTO 425 azide
    ATTO 425 Azide is an azide derivative of ATTO 425, the maximum excitation and emission wavelength: 439/489 nm. ATTO 425 azide is a click chemistry reagent, it contains an Azide group and can undergo copper-catalyzed azide-alkyne cycloaddition reaction (CuAAc) with molecules containing Alkyne groups. It can also undergo strain-promoted alkyne-azide cycloaddition (SPAAC) reactions with molecules containing DBCO or BCN groups.
    ATTO 425 azide
  • HY-D1355
    Azide cyanine dye 728
    Azide cyanine dye 728 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.
    Azide cyanine dye 728
  • HY-D2795B
    FITC-PEG-COOH (MW 5000)
    FITC-PEG-COOH (MW 5000) is a fluorescent dye composed of polyethylene glycol (PEG), FITC (HY-66019) and a COOH. FITC-PEG-COOH (MW 5000) can be used for fluorescent labeling and imaging.
    FITC-PEG-COOH (MW 5000)
  • HY-151774
    TAMRA hydrazide (6-isomer)
    TAMRA hydrazide (6-isomer) is a click chemistry reagent that can be coupled to carbonyl compounds. The dye hydrazide in TAMRA hydrazide (6-isomer) labels carbonyl compounds such as aldehydes and ketones. TAMRA in TAMRA hydrazide (6-isomer) is a xanthene red fluorophore that reacts with terminal alkynes.
    TAMRA hydrazide (6-isomer)
  • HY-139673
    BG dimer
    BG dimer is a molecular dimer organic luminogen with aggregation-induced emission.
    BG dimer
  • HY-D0071
    N-4-(5,6-Dimethoxy-N-phthalimidinyl)phenylmaleimide
    N-4-(5,6-Dimethoxy-N-phthalimidinyl)phenylmaleimide is a fluorescence reagent for labeling thiol.
    N-4-(5,6-Dimethoxy-N-phthalimidinyl)phenylmaleimide
  • HY-156306
    Coumarin-PEG3-TCO
    Coumarin-PEG3-TCO is a dye derivative of Coumarin (HY-N0709) containing 3 PEG units. Coumarin-PEG3-TCO utilizes its TCO group to undergo an inverse electron demand Diels-Alder reaction (iEDDA) with molecules bearing Tetrazine groups.
    Coumarin-PEG3-TCO
  • HY-D1988
    ATTO 620 biotin
    ATTO 620 Biotin is a biotin derivative of ATTO 620 with maximum excitation/emission wavelengths: 620/642 nm.
    ATTO 620 biotin
  • HY-D0120
    CytoRed
    CytoRed (7-(Isobutyloxycarbonyloxy)-3H-phenoxazin-3-on) 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.
    CytoRed
  • HY-D1572
    Carbostyril 165
    Carbostyril 165 is an electronically neutral fluorescent dye (Ex: 351/364 nm, Em: >400 nm).
    Carbostyril 165
  • HY-134620
    Cyanine 5 NHS ester tetrafluoroborate
    Cyanine 5 NHS ester tetrafluoroborate (Compound Cy5) is a cyanine dye that is used to in fluorescence detection of macromolecules. Cyanine 5 NHS ester tetrafluoroborate exhibits an excitation wavelength of 638 nm.
    Cyanine 5 NHS ester tetrafluoroborate
  • HY-D2040
    5-ROX tetrazine
    ROX tetrazine is a derivative of ROX (Rhodamine X, Rhodamine 101) dye, a red-emitting fluorophore possessing high brightness and fluorescence quantum yield. This compound contains tetrazine moiety that reacts with trans-cycloalkenes and other strained olefins in inverse electron demand Diels-Alder reaction (IEDDA). The reaction is very quick and specific.
    5-ROX tetrazine
  • HY-D2060
    ATTO 740
    ATTO 740 is a new type of fluorescent dye with high fluorescence yield, which can be used for most labeling applications, maximum excitation/emission wavelength: 743/763 nm.
    ATTO 740
  • HY-D1113
    TFAX 488,TFP
    TFAX 488,TFP is a green fluorescent dye and exhibits pH-insensitivity over a very broad range (pH in the 4-10). TFAX 488,TFP yields exceptionally bright, photostable conjugates with proteins or antibodies (such as goat anti-mouse IgG, streptavidin).
    TFAX 488,TFP
  • HY-160063
    SW1 aptamer sodium
    SW1 aptamer sodium is a high-affinity DNA aptamer (Kd: 123.62 nM) that targets liver cancer SMMC-7721 cells and targets intracellular components within the nucleus. SW1 aptamer sodium can also identify various other types of cancer cells and tissues, serving as an effective molecular probe for clinical cancer diagnosis.
    SW1 aptamer sodium
  • HY-D0030
    2-Anthracenylsulfonyl chloride
    2-Anthracenylsulfonyl chloride 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.
    2-Anthracenylsulfonyl chloride
  • HY-172164
    FITC-lysine-dextran (MW 4kDa)
    FITC-lysine-dextran, 4kDa 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 4kDa)
Cat. No. Product Name / Synonyms Application Reactivity