2. Signaling Pathways
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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-D2566
    Cy5.5-PEG-DSPE (MW 3400)
    Cy5.5-PEG-DSPE (MW 3400) is a PEG phospholipid with Cy5.5 (HY-D0924) dye used in protein/nucelic acid labeling and fluorescence microscopy. Cy5.5-PEG-DSPE (MW 3400) can self-assemble in aqueous solution to form micelles/lipid bilayer and used to prepare liposomes or nanoparticles for nutrients delivery such as mRNA or DNA vaccine.
    Cy5.5-PEG-DSPE (MW 3400)
  • HY-D0361
    Direct red 26
    Direct red 26 is a good dyeing agent for cotton fabrics.
    Direct red 26
  • HY-164900
    Se-NADA
    Se-NADA is a fluorescent dye that can be used to image bacteria (Ex/Em = 470/590 nm) .
    Se-NADA
  • HY-D0245
    Direct Red 23
    Direct Red 23 is a good dyeing agent for cotton fabrics.
    Direct Red 23
  • HY-W320994
    Heptanamide
    Heptanamide (Enanthamide) is a metabolite of azo dye Reactive Black 5 (RB5). Heptanamide can be used for bioremediation of azo dyes contaminated environments research
    Heptanamide
  • HY-160273
    DOPE-PEG-Fluor 488,MW 5000
    DOPE-PEG-Fluor 488, MW 5000 is a PEG lipid, composed of a DOPE phospholipid and a Fluor 488 dye.
    DOPE-PEG-Fluor 488,MW 5000
  • HY-D0438
    C.I. Acid red 114
    C.I. Acid red 114 is an acid red dye that can be adsorbed and removed by bentone clay.
    C.I. Acid red 114
  • HY-D2565
    Cy5.5-PEG-DSPE (MW 2000)
    Cy5.5-PEG-DSPE (MW 2000) is a PEG phospholipid with Cy5.5 (HY-D0924) dye used in protein/nucelic acid labeling and fluorescence microscopy. Cy5.5-PEG-DSPE (MW 2000) can self-assemble in aqueous solution to form micelles/lipid bilayer and used to prepare liposomes or nanoparticles for nutrients delivery such as mRNA or DNA vaccine.
    Cy5.5-PEG-DSPE (MW 2000)
  • HY-D2557
    Cy5.5-PEG-SH (MW 3400)
    Cy5.5-PEG-SH (MW 3400) 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 3400)
  • HY-D2488
    Sulfo Cy5.5-maleimide
    Sulfo Cy5.5-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.
    Sulfo Cy5.5-maleimide
  • HY-D2595
    Cy7.5-PEG-DSPE (MW 5000)
    Cy7.5-PEG-DSPE (MW 5000) is a PEG phospholipid with CY7.5 (HY-D0926) dye used in protein/nucelic acid labeling and fluorescence microscopy. Cy7.5-PEG-DSPE (MW 5000) can self-assemble in aqueous solution to form micelles/lipid bilayer and used to prepare liposomes or nanoparticles for nutrients delivery such as mRNA or DNA vaccine (Ex/Em = 770/820 nm).
    Cy7.5-PEG-DSPE (MW 5000)
  • HY-D0462
    Direct Yellow 44
    Direct Yellow 44 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.
    Direct Yellow 44
  • HY-D2506
    Cy3-PEG-NH2 (MW 3400)
    Cy3-PEG-NH2 (MW 3400) is a polyethylene glycol derivative containing Cy3 (HY-D0822) fluorescent dye and polyethylene glycol (PEG) and an amino group. 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. Cy3-PEG-NH2 (MW 3400) can be used for fluorescence imaging, fluorescence tracing and fluorescence labeling.
    Cy3-PEG-NH2 (MW 3400)
  • HY-123630R
    Allura Red AC (Standard)
    Allura Red AC (Standard) is an analytical standard of Allura Red AC. This product is intended for research and analytical applications. Allura Red AC is a food colorant, appearing as a deep red water-soluble powder or granules, used in various applications such as beverages, syrups, candies, and cereals. Allura Red AC can statically quench the intrinsic fluorescence of HSA. Additionally, Allura Red AC is a 5-hydroxytryptamine (5-HT) pathway-associated pro-inflammatory agent, capable of exacerbating experimental colitis. Allura Red AC holds potential for research in inflammatory bowel disease (IBD), intestinal barrier function, and food additive safety.
    Allura Red AC (Standard)
  • HY-D2703
    Cy7.5 HA biotin (MW 5000)
    Cy7.5 HA biotin (MW 5000) is a biotinylated hyaluronic acid labeled with CY7.5 (HY-D0926). Cy7.5 HA biotin (MW 5000) is widely used for cell imaging and in vivo imaging of shallow tissues (Ex/Em = 770/820 nm).
    Cy7.5 HA biotin (MW 5000)
  • HY-W998643
    6, 8-Difluoro-7-hydroxy-4-methylcoumarin NHS ester
    6,8-Difluoro-7-hydroxy-4-methylcoumarin NHS Ester is a molecule with an excitation at 365 nm and emission at 460 nm. The NHS ester can be applied to label the primary amines (-NH2) of proteins, amine-modified oligonucleotides, and other amine-containing molecules.
    6, 8-Difluoro-7-hydroxy-4-methylcoumarin NHS ester
  • HY-D0931R
    Sudan III (Standard)
    Sudan III (Standard) is the analytical standard of Sudan III. This product is intended for research and analytical applications. Sudan III is a hydrophobic bisazo dye.
    Sudan III (Standard)
  • HY-D0475
    C.I.Solvent yellow 176
    C.I.Solvent yellow 176 is a quinoline dye.
    C.I.Solvent yellow 176
  • HY-D0416
    Disperse yellow 9
    Disperse yellow 9 is a yellow dye commonly used for fiber dyeing.
    Disperse yellow 9
  • HY-D2840C
    FITC-mPEG (MW 1000)
    FITC-mPEG (MW 1000) is a fluorescent dye composed of methoxypolyethylene glycol (mPEG) and FITC (HY-66019). FITC-mPEG (MW 1000) can be used for fluorescent labeling and imaging.
    FITC-mPEG (MW 1000)
Cat. No. Product Name / Synonyms Application Reactivity