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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-177620D
    Cy3 labled Cadapersen sodium
    Cy3 labled Cadapersen sodium is a Cy3 labled Cadapersen sodium.
    Cy3 labled Cadapersen sodium
  • HY-D2053
    ATTO 532 hydrazid
    ATTO 532 hydrazid is a hydrazide derivative of ATTO 532 with maximum excitation/emission wavelengths: 532/552 nm.
    ATTO 532 hydrazid
  • HY-D2043
    ATTO 620
    ATTO 620 is a new type of fluorescent dye with high fluorescence yield, which can be used for most labeling applications, maximum excitation/emission wavelength: 620/642 nm.
    ATTO 620
  • HY-D1777
    Pyrromethene 605
    Pyrromethene 605 (PM605) is a green-fluorescent polar tracer dye. It is used for investigations of membrane fusion, lysis, and gap-junctional communication and to detect volume changes in cells or liposomes.
    Pyrromethene 605
  • HY-153837E
    Cy3 labled ISIS 14803 sodium
    Cy3 labled ISIS 14803 sodium is a Cy3 labled ISIS 14803 sodium.
    Cy3 labled ISIS 14803 sodium
  • HY-D2886A
    RB-PEG600-N3
    RB-PEG600-N3 (Rhodamine B-PEG600-N3) is a fluorescent dye composed of Rhodamine B (HY-Y0016), PEG and azide group (N3). RB-PEG600-N3 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 (Ex/Em=546/610 nm).
    RB-PEG600-N3
  • HY-D0070
    DAF-2T
    DAF-2T (Diaminofluorescein 2T) 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.
    DAF-2T
  • HY-N16315
    Di-sulfo squarefluor 640/660 free acid
    Di-sulfo squarefluor 640/660 free acid is a fluorescent lipid that can be used to visualize cell membranes (Ex/Em = 640/660 nm).
    Di-sulfo squarefluor 640/660 free acid
  • HY-D3276
    PE-Cy7
    PE-Cy7 is a tandem fluorescent dye composed of R-phycoerythrin (PE) coupled with the near-infrared dye Cy7. It is primarily excited by a 488 nm laser, with a maximum emission wavelength of approximately 780 nm. PE-Cy7 is widely used in flow cytometry and immunofluorescence staining.
    PE-Cy7
  • HY-D2253
    Direct Blue 108
    Direct Blue 108 has the structure of triphenyl two oxazine, and can be used in dyeing of cotton, viscose fiber, silk and its blended fabrics.
    Direct Blue 108
  • HY-W738478
    AOI 987
    AOI 987 is an oxazine dye and fluorescent molecule. AOI 987 can bind to biological macromolecules.
    AOI 987
  • HY-D1901
    FAM-dT phosphoramidite
    FAM-dT phosphoramidite (Compound 21) is a fully protected labelled nucleoside phosphoramidite that can be incorporated into oligonucleotides.
    FAM-dT phosphoramidite
  • HY-D2962
    CAQ
    CAQ is a near-infrared fluorescent probe based on a curcumin scaffold (Ex/Em = 565/635). CAQ exhibits high affinity for Aβ1-42 aggregates (Kd = 78.89 nM) and excellent selectivity toward common biomolecules. CAQ’s emission wavelength shows significant solvent dependence. CAQ, by incorporating intramolecular rotation donors and quinoline functional groups, can be used for the specific detection and imaging of Aβ aggregates in Alzheimer's disease.
    CAQ
  • HY-D3277
    PE-VF594
    PE-VF594 is a high-brightness fluorescent dye used in flow cytometry, primarily for labeling antibodies or streptavidin to help identify specific cell subpopulations. PE-VF594 is a tandem dye composed of two covalently linked fluorescent groups: one is phycoerythrin (PE), responsible for absorbing laser energy; the other is the receptor molecule VF594. Energy is transferred from PE to VF594 via fluorescence resonance energy transfer (FRET) mechanism (Ex/Em = 450-500 nm/614 nm) .
    PE-VF594
  • HY-D2176
    AF 555 carboxylic acid
    AF 555 carboxylic acid is a derivative of the orange fluorescent dye AF 555. AF 555 carboxylic acid is widely used in cell dyes, biological dyes, biomolecules and particle fluorescent labeling. AF 555 exhibits average excitation wavelengths under green laser and red laser of 510 nm and 610 nm, respectively.
    AF 555 carboxylic acid
  • HY-D2572
    Cy5.5-PEG5000-DBCO
    Cy5.5-PEG5000-DBCO is a fluorescent probe containing Cy5.5 (HY-D0924) dye. Cy5.5-PEG5000-DBCO contains a DBCO group that can undergo strain-promoted alkyne-azide cycloaddition (SPAAC) with molecules containing Azide groups.
    Cy5.5-PEG5000-DBCO
  • HY-177635D
    Cy3 labled GNKG168 sodium
    Cy3 labled GNKG168 sodium is a Cy3 labled GNKG168 sodium.
    Cy3 labled GNKG168 sodium
  • HY-D1934
    ATTO 465
    ATTO 465 is a new fluorescent dye with good photostability and maximum excitation/emission wavelength: 453/506 nm.
    ATTO 465
  • HY-15627A
    Hoechst 33342 analog trihydrochloride
    Hoechst 33342 analog trihydrochloride is a marker dye in Hoechst series. Hoechst is A live nuclear marker dye. Hoechst binds to the grooves in the DNA double strand, which tends to be A/ T-rich DNA strand. Although it binds to all nucleic acids, the A/ T-rich double strand DNA significantly enhances fluorescence intensity Therefore,Hoechst dye can be used for living cell labeling. The fluorescence intensity of Hoechst dye increases with the increase of pH of solution. Storage: Keep away from light.
    Hoechst 33342 analog trihydrochloride
  • HY-D3305
    DiD 4-chlorobenzenesulfonate
    DiD is a long-chain carbocyanine dye. Carbocyanine dyes are widely used as Di to label cells, organelles, liposomes, viruses and lipoproteins (Ex/Em = 633/665 nm) .
    DiD 4-chlorobenzenesulfonate
Cat. No. Product Name / Synonyms Application Reactivity