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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-P0028
    Phalloidin
    		99.83%
    Phalloidin is a mushroom-derived toxin which can be used to label F-actin of the cytoskeleton with fluorochrome .
    Phalloidin
  • HY-D1744
    ICG Maleimide
    ICG Maleimide is thiol reactive near infrared (NIR) fluorescent dye and used to generate a stable fluorescence signal in bioimaging.
    ICG Maleimide
  • HY-W127703
    Octadecyl Rhodamine B chloride
    		99.58%
    Octadecyl Rhodamine B chloride is a cationic amphiphile that can be used for staining cell membranes. Octadecyl Rhodamine B chloride can be used in numerous studies including electronic energy transfer in organized molecular assemblies, membrane structure, and distances of closest approach between protein domains and membranes.
    Octadecyl Rhodamine B chloride
  • 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-D1249
    Calcein (mixture of isomers)
    Calcein mixture of isomers is a calcium-dependent fluorescent molecule. Calcein mixture of isomers can be used to study bone metabolism (in vivo) and to stain depressed areas (in vitro). Calcein mixture of isomers can also be used for fluorometry and EDTA titration of calcium ion.
    Calcein (mixture of isomers)
  • HY-140947
    TAMRA-Azide-PEG-biotin
    		≥99.0%
    TAMRA-Azide-PEG-biotin is a dye derivative of TAMRA (HY-135640). TAMRA-Azide-PEG-biotin 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.
    TAMRA-Azide-PEG-biotin
  • HY-B0171
    Antipyrine
    		99.98%
    Antipyrine (Phenazone) is an orally active antipyretic and analgesic. Antipyrine can be used as a probe agent for oxidative agent metabolism. Antipyrine also delays gastric emptying (GE) in rats.
    Antipyrine
  • 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-D1738
    DAPI dilactate
    		≥99.0%
    DAPI (dilactate) is a blue fluorescent dye that preferentially binds dsDNA and binds to minor groove AT clusters. DAPI (dilactate) is combined with dsDNA, and the fluorescence was enhanced about 20-fold. DAPI (dilactate) can be used to identify the cell cycle and specifically stains the nucleus but not the cytoplasm. DAPI (dilactate) form is more soluble in water than DAPI (dihydrochloride) form.
    DAPI dilactate
  • HY-P2528
    Enhanced Green Fluorescent Protein (EGFP) (200-208)
    		98.97%
    Enhanced Green Fluorescent Protein (EGFP) (200-208) is a marker gene product derived from the jellyfish Aequorea Victoria. Enhanced Green Fluorescent Protein (EGFP) (200-208) is a common reporter protein and is easy to detect.
    Enhanced Green Fluorescent Protein (EGFP) (200-208)
  • HY-D1775
    LysoTracker Blue DND-22
    Lysotracker blue DND-22 is a blue-fluorescent probe for staining acidic compartments in live cells.
    LysoTracker Blue DND-22
  • 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-D1817
    Vari Fluor 488-Phalloidin
    Vari Fluor 488-Phalloidin is a fluorescent derivative of Phalloidin that specifically labels myofilament proteins and exhibits green fluorescence when labeled, allowing for fluorescence imaging using FITC channels (Ex/Em=488 nm/513 nm).
    Vari Fluor 488-Phalloidin
  • HY-125623
    MitoPerOx
    		98.14%
    MitoPerOx is a mitochondrial-targeted, lipid peroxidation-indicating fluorescent probe with BODIPY581/591 fluorophores. The triphenylphosphine cation (TPP+) of MitoPerOx can be selectively enriched in mitochondria (depending on membrane potential) and can be used to detect lipid peroxidation in the inner mitochondrial membrane. Under the action of lipid peroxides, the BODIPY581/591 fluorophores of MitoPerOx shift their emission wavelength from 590 nm (reduced state) to 520 nm (oxidized state), and ratiometric detection can be performed at an excitation wavelength of 488 nm. MitoPerOx can specifically monitor the peroxidation of mitochondrial phospholipids (especially cardiolipin) and is used in the study of oxidative stress-related diseases (such as aging, neurodegenerative diseases, and mitochondrial dysfunction)[1][2].
    MitoPerOx
  • HY-D0048
    5-TAMRA-SE
    		98.25%
    5-TAMRA-SE is an amine-reactive fluorescent agent, and its conjugate produces bright, pH-insensitive orange-red fluorescence with good photostability.
    5-TAMRA-SE
  • HY-15558A
    Hoechst 33258 trihydrochloride
    		99.51%
    Hoechst 33258 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.
    Hoechst 33258 trihydrochloride
  • HY-126226
    MK-6240 Precursor
    		99.54%
    MK-6240 Precursor (6e) is the synthetic precursor of (18)[F]-MK-6240. (18)F]-MK-6240 is a tau positron emission tomography (PET) tracer for neurofibrillary tangles (NFTs), exhibiting high specificity and selectivity for binding to NFTs.
    MK-6240 Precursor
  • HY-B1571
    Bromophenol blue
    Bromophenol blue is an acid phthalein dye, and it is used as a tracking dye for electrophoresis. Bromophenol blue is also used as a pH indicator, with a transition range of pH 3 to 4.6. Bromophenol blue is used as a sensor for the determination of several compounds including ammonia, drugs, proteins and amino acids. The binding of Bromophenol blue to proteins is accompanied by the appearance of a strong absorbance at 610 nm.
    Bromophenol blue
  • HY-101883
    BCECF-AM
    		≥99.0%
    BCECF-AM is a cell membrane permeable compound widely used as a fluorescent indicator for intracellular pH.
    BCECF-AM
Cat. No. Product Name / Synonyms Application Reactivity