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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-D1837
    Vari Fluor 488 TSA（200×）
    Vari Fluor 488 TSA（200×） (VF 488 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 488 TSA（200×）
  • HY-D0001
    Alcian Blue 8GX
    Alcian Blue 8GX is a commonly used phthalocyanine dye that binds to glycoproteins and glycosaminoglycans. Alcian Blue 8GX has a wide range of applications in biological staining, including proteins in brain tumors and DNA in cells and tissues.
    Alcian Blue 8GX
  • HY-D0722
    5(6)-CFDA
    		99.31%
    5(6)-CFDA is a common aliphatic luciferin-line organism. CFDA conducts free diffusion into cells, and then it is hydrolyzed into carboxyl fluorescein (CF) by intracellular non-specific lipase. CF containing portion contains an additional negative charge so that it is better retained in cells, compared to fluorescein dyes.
    5(6)-CFDA
  • HY-D1068
    Cy5-DBCO
    		99.86%
    Cy5-DBCO (DBCO-Sulfo-Cy5) is a near-infrared (NIR)red fluorescent dye with λabsand λem of 646nm and 670 nm, respectively. Cy5-DBCO (DBCO-Sulfo-Cy5) is not suitable for staining intracellular components of permeabilezed cell, it may exhibits a high background. Cy5-DBCO is a click chemistry reagent, it contains a DBCO group that can undergo strain-promoted alkyne-azide cycloaddition (SPAAC) with molecules containing Azide groups.
    Cy5-DBCO
  • HY-15937
    5(6)-FAM SE
    5(6)-FAM SE is a green fluorescent dye widely used for protein labeling.
    5(6)-FAM SE
  • HY-139579
    Pafolacianine
    		99.04%
    Pafolacianine (OTL 38) is a fluorescent marker 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-15941
    5(6)-FITC
    5(6)-FITC (Fluorescein 5(6)-isothiocyanate) is an amine-reactive derivative of a fluorescent dye, characterized by high absorbance and excellent fluorescence quantum yield. The isothiocyanate group of FITC can react with various functional groups on proteins, including amines, thiols, imidazoles, tyrosines and carbonyls, enabling the labeling of proteins such as antibodies and lectins. 5(6)-FITC has a wide range of applications, including flow cytometry, immunofluorescence, protease assays and conjugation. The maximum excitation/emission wavelengths are 492/518 nm.
    5(6)-FITC
  • HY-108166A
    Hydroxystilbamidine bis(methanesulfonate)
    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 bis(methanesulfonate)
  • HY-13615A
    EC-17 disodium salt
    EC-17 (disodium salt) is a folate receptor alpha (FRα) targeting contrast agent with fluorescent properties in the visible light spectrum. The peak excitation and emission wavelengths of EC-17 are 470/520 nm.
    EC-17 disodium salt
  • HY-D1506
    Fl-DIBO
    		99.28%
    Fl-DIBO (fluorogenic dibenzocyclooctyne) is a selective and high sensitivity fluorescent probe to azide compounds. Fl-DIBO can react rapidly with azide compounds to form new highly fluorescent products with a maximum emission wavelength of 469 nm and excitation wavelength of 363 nm. Fl-DIBO can be used to label diazo-tagged proteins without detectable background signal interference. Fl-DIBO is a click chemistry reagent, it contains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.
    Fl-DIBO
  • HY-D1040
    Cy5.5-COOH
    		98.99%
    CY5.5-COOH (Cyanine 5.5 carboxylic acid) is a fluorescent dye, is commonly used in bioimaging. CY5.5-COOH shows narrow absorption spectrum, and high sensitivity and stability.
    Cy5.5-COOH
  • HY-D1816
    Vari Fluor 555-Phalloidin
    Vari Fluor 555-Phalloidin is a fluorescent derivative of Phalloidin that specifically labels myofilament proteins and exhibits red fluorescence when labeled, allowing for fluorescence imaging using the PE channel (Ex/Em=550 nm/561 nm).
    Vari Fluor 555-Phalloidin
  • HY-D1094
    Carboxy-SNARF 1 (5/6-mixture)
    Carboxy-SNARF 1 (5/6-mixture) (SNARF 1) is a fluorescent probe that is sensitive to pH. Carboxy-SNARF 1 (5/6-mixture) can be used for measurement pH.
    Carboxy-SNARF 1 (5/6-mixture)
  • HY-D0995
    7-Methyl-6-thioguanosine
    		≥99.0%
    7-Methyl-6-thioguanosine (MESG) is a chromophoric substrate which can be used for the quantitation of inorganic phosphate. 7-Methyl-6-thioguanosine is also used to determine the activity of purine nucleoside phosphorylase.
    7-Methyl-6-thioguanosine
  • HY-D1727
    CellTracker Red CMTPX
    CellTracker Red CMTPX is a cell-permeable fluorescent dye that can be used as a cell tracer for monitoring cell movement and location (Ex/Em=586/614 nm).
    CellTracker Red CMTPX
  • HY-D0069
    CPM
    		≥99.0%
    CPM is a maleimide derivative, acting as a blue fluorescent thiol-reactive dye. The excitation/emission maxima is 384/470 nm.
    CPM
  • HY-W127715
    Lucifer Yellow CH dipotassium salt
    		99.87%
    Lucifer Yellow CH dipotassium is a high-intensity fluorescent probe containing free hydrazyl groups. Lucifer Yellow CH can react with fatty aldehydes at room temperature. Lucifer Yellow CH serves as a biological tracer to monitor neuronal branching, regeneration, gap junction detection and characterization, and selective ablation of cells after aldehyde fixation. Lucifer yellow CH displays the maximum excitation/emission of 430 nm/540 nm, respectively.
    Lucifer Yellow CH dipotassium salt
  • HY-101882
    BCECF
    BCECF is a pH-sensitive fluorescent dye. BCECF allows measurements in the physiological pH range 6.0–8.0. Excitation ratio: 490/440 nm; Emission intensity: 535 nm.
    BCECF
  • HY-D1836
    Vari Fluor 555 TSA (200x)
    Vari Fluor 555 TSA (200x) , also know as VF 555 Tyramide. Vari Fluor 555 TSA (200x) is one of Vari Fluor TSA series fluorescent probes, which can be used for high-density in situ labeling assays. Vari Fluor TSA series target antigens via horseradish peroxidase (HRP), which are widely used in ELISA, IF, IHC and other techniques with high detection sensitivity.
    Vari Fluor 555 TSA (200x)
  • HY-W010042
    L-Glucose
    		99.88%
    L-Glucose (L-(-)-Glucose) is a stereoisomer of D-Glucose (HY-B0389), which does not readily enter the brain. L-Glucose can promote food intake. L-glucose is combined with a fluorescence detector to produce a fluorescent probe that can be used to visualize and characterize cancer cells. L-Glucose also can be used in the research to enhance memory in mice.
    L-Glucose
Cat. No. Product Name / Synonyms Application Reactivity