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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-D0032
    DAF-2DA
    DAF-2DA (5,6-Diaminofluorescein diacetat) is most widely probe for NO measurement.
    DAF-2DA
  • HY-D1736
    BODIPY FL-C16
    		99.84%
    BODIPY FL-C16 is a BODIPY-labeled analog of Palmitic acid (HY-N0830), which serves as a fluorescent lipid tracer. BODIPY FL-C16 also acts as a ligand for liver fatty acid-binding protein (L-FABP) and intestinal fatty acid-binding protein (I-FABP) , with Kd values of 270 nM and 330 nM, respectively. BODIPY FL-C16 is rapidly taken up by cells, and after metabolic conversion to phospholipids, it is incorporated into the membrane structures of intracellular organelles and extracellular vesicles.
    BODIPY FL-C16
  • HY-W250727
    TNS sodium
    		99.97%
    TNS (6-(p-Tolylamino) naphthalene-2-sulfonate) sodium is a fluorescent probe used to detect the conformational state of proteins. TNS sodium binds to the central hydrophobic calyx of β-lactoglobulin (β-LG) to form a 1:1 complex, which stabilizes the folded conformation of β-LG. TNS sodium shows weak fluorescent signals in aqueous solution, but its fluorescence intensity increases significantly upon binding to the hydrophobic domains of proteins, with the maximum excitation wavelength and maximum emission wavelength located at 321 nm and 446 nm, respectively.
    TNS sodium
  • HY-43520
    BODIPY-FL
    		99.15%
    BODIPY-FL is a green fluorescent dye that can be used to label probes or primers. BODIPY-FL fluorescence can be quenched after interacting with uniquely positioned guanine, making it useful for quantifying specific DNA or RNA molecules. The maximum absorption wavelength of BODIPY-FL is 505 nm, and the maximum emission wavelength is 513 nm.
    BODIPY-FL
  • HY-137784
    Boc-Val-Pro-Arg-AMC hydrochloride
    		99.43%
    Boc-Val-Pro-Arg-AMC hydrochloride is a sensitive fluorogenic substrate for measuring trypsin-like serine proteases activity.
    Boc-Val-Pro-Arg-AMC hydrochloride
  • HY-123533
    Resorufin
    		98.92%
    Resorufin (NSC 12097) is a highly fluorescent pink dye. Resorufin shows favorable properties such as water solubility, red-shifted absorption/emission signals. Resorufin is used for the detection of ROS/RNS and a second analyte.
    Resorufin
  • HY-D1807
    Vari Fluor 555-Streptavidin
    Vari Fluor 555-Streptavidin is a dye marker of Vari Fluor-streptavidin consisting of labeling streptavidin with a Vari Fluor series of fluorescent probes. Streptavidin is a high-affinity tetramer protein, each tetramer consisting of four identical streptavidin subunits. Streptavidin binds to biotin specifically via a reversible non-covalent effect. Streptavidin can achieve rapid and efficient detection of biotin markers, and is often used in immunofluorescence (IF), enzyme-linked immunosorbent assay (ELISA), immunohistochemical staining (IFH), in situ hybridization (ISH) and other experiments. Ex/Em=555 nm/565 nm.
    Product Concentration: 0.8 mg/mL
    Vari Fluor 555-Streptavidin
  • HY-D1806
    Vari Fluor 594-Streptavidin
    Vari Fluor 594-Streptavidin is a dye marker of Vari Fluor-streptavidin consisting of labeling streptavidin with a Vari Fluor series of fluorescent probes. Streptavidin is a high-affinity tetramer protein, each tetramer consisting of four identical streptavidin subunits. Streptavidin binds to biotin specifically via a reversible non-covalent effect. Streptavidin can achieve rapid and efficient detection of biotin markers, and is often used in immunofluorescence (IF), enzyme-linked immunosorbent assay (ELISA), immunohistochemical staining (IFH), in situ hybridization (ISH) and other experiments. Ex/Em=590 nm/617 nm.
    Product Concentration: 0.8 mg/mL
    Vari Fluor 594-Streptavidin
  • HY-150145A
    Cy5-UTP sodium (10 mM in water)
    		99.26%
    Cy5-UTP sodium (10 mM in water) is a fluorescently labeled ribonucleotide triphosphate that can be used as a substrate for terminal deoxynucleotide transferase (TdT). Cy5-UTP sodium can be used to label RNA probes generated in vitro (Ex/Em: 650/665 nm). Cy5-UTP sodium can be applied in FISH, multi-color fluorescence analysis, especially in dual-color expression arrays combined with Cy5-UTP.
    Cy5-UTP sodium (10 mM in water)
  • HY-D1119C
    AF647-NHS ester triTEA
    		99.74%
    AF647-NHS ester is an analogue of Alexa Fluor 647 (AF647), which has excitation wavelength (λex) of 635 nm (conventional fluorescence detection)/620 nm (instantaneous detection). NHS ester can covalently bind to molecules with amino groups (such as proteins, antibodies, etc.).
    AF647-NHS ester triTEA
  • HY-D1711
    MHI-148
    		98.39%
    MHI-148 is a near-infrared heptamethine cyanine dye with tumor-targeting properties for cancer detection, diagnosis and research. MHI-148 is immediately taken up and accumulated by lysosomes and mitochondria of tumor cells, but not in lysosomes and mitochondria of normal cells.
    MHI-148
  • HY-D1742
    DeepRed Nucleus Dye
    		Chemical
    DeepRed Nucleus Dye is a novel cell permeant and far red-fluorescing DNA probe. DeepRed Nucleus Dye excites at a wavelength of 647 nm, close to the Ex, and produces a fluorescence spectrum extending from 665 nm out to beyond 780 nm wavelengths. DeepRed Nucleus Dye fluorescence reflects cellular DNA content. DeepRed Nucleus Dye can be used in combination with FITC and RPE-labelled antibodies, without the need for fluorescence compensation.
    DeepRed Nucleus Dye
  • HY-15940
    5(6)-Carboxyfluorescein
    		99.66%
    5(6)-Carboxyfluorescein (5(6)-FAM) is an amine-reactive pH-sensitive green fluorescent probe. 5(6)-Carboxyfluorescein (5(6)-FAM) can be used to label proteins, peptides and nucleotides. 5(6)-Carboxyfluorescein can be used for the detection of tumour areas in vivo.
    5(6)-Carboxyfluorescein
  • HY-137834
    Gly-Pro-AMC hydrobromide
    		98.68%
    Gly-Pro-AMC hydrobromide is a fluorescent dye, it can be used as a specific fluorescent substrate for detecting Dipeptidyl peptidase IV (DPP-IV) activity.
    Gly-Pro-AMC hydrobromide
  • HY-B1025
    Digoxigenin
    		99.70%
    Digoxigenin (DIG) is a steroid. DIG is used for situ hybridization as a labeling molecule probe due to long shelf life and fast detection and high sensitivity of DIG-labeled riboprobes.
    Digoxigenin
  • HY-D0073
    2,3-Diaminonaphthalene
    		98.00%
    2,3-Diaminonaphthalene is a fluorescent reagent used to detect selenium and nitric oxide (NO). 2,3-Diaminonaphthalene binds to selenium to form pyrazolene selenol, with excitation/emission maxima at 365 nm and 525 nm, respectively. 2,3-Diaminonaphthalene binds to NO2− to form the fluorescent product, 1-(H)-napthotriazole, with excitation/emission maxima at 360 nm and 440 nm, respectively.
    2,3-Diaminonaphthalene
  • HY-111391A
    Resazurin sodium, indicator
    		98.06%
    Resazurin (Diazoresorcinol) sodium, indicator is a non-toxic, stable, membrane-permeable blue non-fluorescent dye (faintly fluorescent). Resazurin sodium, indicator is used as a redox indicator, can be reduced to pink, highly fluorescent Resorufin (Ex=530-560 nm, Em=590 nm) in living cells. Resazurin sodium, indicator can be used for the detection of cell viability, toxicity, proliferation, migration and invasion in cells (human, plant and animal, bacterial and fungal).
    Resazurin sodium, indicator
  • HY-D0022
    5-Aminofluorescein
    		99.66%
    5-Aminofluorescein (5-AF) is a fluorescence marker, covalently bound to human serum albumin. The excitation wavelength is 495 nm and the emission wavelength is 535 nm.
    5-Aminofluorescein
  • HY-D1040
    Cy5.5-COOH
    		98.82%
    Cy5.5-COOH (Cyanine 5.5 carboxylic acid) is a fluorescent dye that emits fluorescence at 710 nm upon excitation at 650 nm. Cy5.5-COOH possesses excellent spectral properties, including a narrow absorption spectrum, high sensitivity, and stability. Cy5.5-COOH can be used for bioimaging and disease diagnosis.
    Cy5.5-COOH
  • HY-D1119
    AF647-NHS ester
    AF647-NHS ester is an analog of Alexa Fluor 647 (AF647). NHS ester can covalently bind to molecules with amino groups (such as proteins, antibodies, etc.). AF647 is a far-red fluorescent dye with an excitation wavelength (λex) of 635 nm (conventional fluorescence detection)/620 nm (instantaneous detection). Storage: Protect from light.
    AF647-NHS ester
Cat. No. Product Name / Synonyms Application Reactivity