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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-D1390A
    Sulfo-Cy5-Mal
    		99.33%
    Sulfo-Cy5-Mal is a fluorescent dye derivative composed of a CY5 dye and a maleimide functional group. Sulfo-Cy5-Mal specifically covalently binds to thiol-containing (-SH) biomolecules. Sulfo-Cy5-Mal can be used for protein labeling, antibody conjugation, molecular imaging, and drug delivery studies (Ex/Em = 633 nm/670 nm).
    Sulfo-Cy5-Mal
  • HY-126831
    SBFI-AM
    		98.0%
    SBFI-AM is a Na+ selective fluorescent indicator. SBFI-AM shows selectivity for Na+ over K+ with Kd values of 6.7 and 166 mM, respectively (Ex = 340/380 nm; Em = 500 nm).
    SBFI-AM
  • HY-D1568
    Sulfo-Cy7.5 NHS ester
    Sulfo-Cy7.5 NHS ester is a near infrared water soluble hydrophilic dye, also is an NHS ester for the modification of amine groups. Sulfo-Cy7.5 NHS ester contains a trimeth ylene bridge and has a linker arm for its attachment to proteins, peptides, and other molecules. Sulfo-Cy7.5 NHS ester can be used for the research of NIR imaging applications.
    Sulfo-Cy7.5 NHS ester
  • HY-W040143
    2',7'-Dichlorofluorescein
    		99.22%
    2',7'-Dichlorofluorescein is an important fluorescent product in the detection of oxidative stress and can be used to measure reactive oxygen species (ROS) (Ex=503 nm and Em=523 nm).
    2',7'-Dichlorofluorescein
  • HY-D1378
    C-Laurdan
    C-Laurdan is a modified Laurdan (HY-D0080) probe that imaging lipid rafts with environmentally sensitive fluorescence. C-Laurdan can be used in research of lipid arrangement and fluidity in biological membranes or artificial lipid membranes.
    C-Laurdan
  • HY-139579
    Pafolacianine
    		99.04%
    Pafolacianine (OTL 38) is a fluorescent imaging agent made of near-infrared dye used in detecting tumor lesions during surgical procedures. Pafolacianine excites at 774 to 775 nm and emits at 794 to 796 nm.
    Pafolacianine
  • HY-108166A
    Hydroxystilbamidine bismethanesulfonate
    		98.27%
    Hydroxystilbamidine bis(methanesulfonate) is a dye that can bind to DNA and RNA; it's a fluorescent cationic dye, often used as a retrograde neuronal tracer and has also been found to be a potent inhibitor of cellular ribonucleases.
    Hydroxystilbamidine bismethanesulfonate
  • HY-NP035
    Ovalbumin-FITC
    Ovalbumin-FITC is an ovalbumin conjugated to FITC (Ex=495 nm; Em=525 nm). Ovalbumin-FITC can be internalized by cells via endocytosis.
    Ovalbumin-FITC
  • HY-D1117
    NADA-green
    NADA-green is a fluorescent D-amino acid probe. NADA-green is efficiently incorporated into the peptidoglycan of diverse bacterial species peptidoglycan biosynthesis. NADA-green allows probing of bacterial growth with minimal perturbation.
    NADA-green
  • HY-120601
    Alizarin Red S sodium
    Alizarin Red S sodium is an anthraquinone derivative dye. When combined with cations such as calcium ions, the functional group of Alizarin Red S sodium can form a coordination bond with the cation through the oxygen atom to show orange-red fluorescence. Alizarin Red S sodium can be used for screening of calcium compounds in synovial fluid and detecting osteoblast differentiation, and can also be used for bone staining in mice. Excitation/emission wavelength: 500/570 nm.
    Alizarin Red S sodium
  • HY-D1249
    Calcein (mixture of isomers)
    Calcein (mixture of isomers), Calcein (HY-D0040) Derivative, is a fluorescent dye (Ex/Em = 495/515 nm). Calcein (mixture of isomers) can be used for the researches for live cell staining, calcium ion detection, bone fluorescence labeling and membrane permeability leakage detection.
    Calcein (mixture of isomers)
  • HY-D0220
    Toluidine Blue
    Toluidine Blue (Toluidine Blue O) is an alkaline quinonimine dye (vivo dye) with high affinity for acidic tissue components, staining nuclei blue and polysaccharides purple. Toluidine Blue shows heterostaining properties for mast cells, mucins and chondrocytes. Toluidine Blue can stain different components of plant tissues and cells in different colours. Toluidine Blue is also used as a diagnostic aid to identify malignant lesions, such as cancer.
    Toluidine Blue
  • HY-D1425
    DCVJ
    		99.48%
    DCVJ (9-(2,2-Dicyanovinyl)julolidine), a molecular rotor and unique fluorescent dye, binds to tubulin and actin, and increases its fluorescence intensity drastically upon polymerization. DCVJ also binds to phospholipid bilayers and increases its fluorescence intensity. DCVJ can detect the kinetic process of degranulation of mast cells (Absorption/emission=489/505 nm).
    DCVJ
  • HY-148263
    Biotin-PEG2000-Thiol
    		98.0%
    Biotin-PEG2000-Thiol is an active compound. Biotin-PEG2000-Thiol is pegylated by binding to streptavidin or antibiotin with high affinity and specificity. Biotin-PEG2000-Thiol can modify biomolecules, proteins, peptides and other small molecule materials. Biotin-PEG2000-Thiol is widely used in the research of agent release and nano new materials.
    Biotin-PEG2000-Thiol
  • HY-D1835
    Vari Fluor 594 TSA (200×)
    Vari Fluor 594 TSA (200×) (VF 594 Tyramide) is a fluorescent probe belonging to the Vari Fluor TSA series. Vari Fluor TSA series fluorescent probes can be used for high-density in situ labeling of target antigens using horseradish peroxidase (HRP) assays, which are widely used in ELISA, IF, IHC and other techniques with high detection sensitivity.
    Vari Fluor 594 TSA (200×)
  • HY-D1122
    Janus green B
    		98.75%
    Janus green B is a supravital stain. Janus green B staining reaction is oxygen dependent, and is reversibly inhibited by cyanide. Janus green B has been used for staining peripheral nerves in live insects, lymphatic vessels of rabbits and mitochondria.
    Janus green B
  • HY-D1157
    HKPerox-2
    		99.79%
    HKPerox-2 is a highly sensitive green fluorescent probe for the specific detection of H2O2 in living cells with a maximum excitation wavelength and emission wavelength of 520 nm and 543 nm, respectively.
    HKPerox-2
  • HY-D0791
    TRITC
    TRITC (5(6)-Tetramethylrhodamine isothiocyanate) is a commonly used fluorescent dye, belonging to the Rhodamine derivative family. It exhibits red fluorescence properties (Ex/Em ≈ 550/580 nm). TRITC can be used for cell labeling and imaging.
    TRITC
  • HY-DY1032
    MitoTracker Green FM (solution)
    Mito-Tracker Green (solution) is a green fluorescent dye that selectively accumulates in the mitochondrial matrix. MitoTracker Green FM covalently binds mitochondrial proteins by reacting with free mercaptan of cysteine residues, allowing staining of mitochondrial membrane potential independent of membrane potential. Excitation/emission wavelength 490/523 nm.
    Solvent and concentration: DMSO: 1 mM
    MitoTracker Green FM (solution)
  • HY-D0961
    Gallocyanine chloride
    Gallocyanine chloride is a synthetic blue dyestuff that can be used as a potential agent for the research of Alzheimer's disease and related neurodegenerative tauopathies. Gallocyanine chloride inhibits DKK1/LRP6 interaction (IC50=6.38 μM), activates Wnt signaling pathway, and causes β-catenin accumulation. Gallocyanine chloride exhibits anti-metastasis, anti-inflammatory and anti-fibrosis activities. Gallocyanine chloride can be used as a fluorescent probe for detection of superoxide anion radicals.
    Gallocyanine chloride
Cat. No. Product Name / Synonyms Application Reactivity