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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-D0122
    6-Iodoacetamidofluorescein
    6-Iodoacetamidofluorescein, a sulphhydryl-specific fluorescent dye, and can be used to selectively label the -SH groups of nuclear matrix polypeptides and proteins.
    6-Iodoacetamidofluorescein
  • HY-D1915
    ATTO 390
    		98.27%
    ATTO 390 is a new fluorescent marker based on the Rhodamine structure. It has strong absorption, high fluorescence quantum yield, high thermal stability and photochemical stability, and is suitable for single molecule detection and high-resolution microscopy.
    ATTO 390
  • HY-D2802B
    FITC-PEG3400-N3
    FITC-PEG3400-N3 is an azide fluorescent dye containing polyethylene glycol (PEG) and FITC (HY-66019). FITC-PEG3400-N3 is a click chemistry reagent, it 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.
    FITC-PEG3400-N3
  • HY-151890
    NIR-βgal-2
    NIR-βgal-2 is a β-galactosidase-activated near-infrared fluorescent probe with superior sensitivity. NIR-βgal-2 can be used for visualizing β-galactosidase in breast cancer.
    NIR-βgal-2
  • HY-D1829
    Vari Fluor 568 Carboxylic acid（free acid）
    Vari Fluor 568 Carboxylic acid (VF 568 Carboxylic acid) free acid is a carboxylic acid derivative of Vari Fluor. Vari Fluor carboxylic acid derivatives are unactivated labeled fluorescent dyes for protein, antibody, and polysaccharide labeling that require carboxylic acid activation for use.
    Vari Fluor 568 Carboxylic acid（free acid）
  • HY-111945
    Cys modifier 1
    		98.95%
    Cys modifier 1 (compound 7) is a cysteine-selective protein modifier for protein bioconjugation. A fluorescent carbonylacrylic derivative bearing nitrobenzofurazan (λex=465nm and λem539 nm)[1].
    Cys modifier 1
  • HY-D2942
    BDP-V BG-BODIPY
    BDP-V BG-BODIPY is a SNAP tag fluorescent probe labeled with a BODIPY molecular motor. BDP-V BG-BODIPY contains a BODIPY molecular rotor that functions as a viscosity-sensitive fluorophore, which is highly responsive to local viscosity changes and enables the specific monitoring of the local microviscosity of proteins. BDP-V BG-BODIPY supports one-photon and two-photon imaging, with an excitation wavelength (Ex) of 488 nm (for one-photon excitation) and 850 nm (for two-photon excitation), and an emission wavelength (Em) of 500-600 nm.
    BDP-V BG-BODIPY
  • HY-D0373
    Indanthren Brown LMG
    Indanthren Brown LMG 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.
    Indanthren Brown LMG
  • HY-D0210
    N-Ethyl-o-toluidine
    N-Ethyl-o-toluidine 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.
    N-Ethyl-o-toluidine
  • HY-129547
    Fluo-3 pentapotassium
    Fluo-3 pentapotassium is a cell-impermeable calcium ion (Ca2+) indicator. Fluo-3 pentapotassium itself is not fluorescent, but it becomes fluorescent after binding to calcium ions (Ex/Em = 488/525 nm).
    Fluo-3 pentapotassium
  • HY-D2251
    DiSulfo-ICG hydrazide
    DiSulfo-ICG hydrazide is a fluorescent dye.
    DiSulfo-ICG hydrazide
  • HY-NP075
    Narcissus Pseudonarcissus (Daffodil) Lectin
    Narcissus Pseudonarcissus (Daffodil) Lectin (NPL) is a plant lectin that can be used as a probe to specifically bind biomolecules (such as polysaccharides, peptides, etc.).Narcissus Pseudonarcissus (Daffodil) Lectin (NPL) is a biological material or organic compound that can be used in life science research.
    Narcissus Pseudonarcissus (Daffodil) Lectin
  • HY-D3250
    PYSNO
    PYSNO is a lysosome-targeted fluorescent probe based on a pyridazinone skeleton (λem=515-565 nm, λex=405 nm) that can be used to track nitric oxide (NO) production in vivo. PYSNO exhibits a rapid, highly sensitive and highly selective "turn-on" response to endogenous and exogenous NO by blocking photoinduced electron transfer and regulating radiative decay rates. PYSNO enables precise in vivo monitoring in a mouse model of myocardial fibrosis and can be applied to the research of related diseases.
    PYSNO
  • HY-D2991
    CDG-DNB3
    CDG-DNB3 is a selective fluorescent probe for Mycobacterium tuberculosis. CDG-DNB3 provides rapid and specific labeling of live Mycobacterium tuberculosis. CDG-DNB3 can image Bacillus Calmette-Guérin phagocytosis in real time.
    CDG-DNB3
  • HY-D0793
    Oenthacid-4-(trifluormethyl)-umbelliferone
    Oenthacid-4-(trifluormethyl)-umbelliferone 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.
    Oenthacid-4-(trifluormethyl)-umbelliferone
  • HY-D3269
    Mito-Cu(II)
    Mito-Cu (II) is a mitochondria-targeted fluorescent probe (Ex/Em = 370/450 nM). Mito-Cu (II) specifically accumulates in mitochondria of living cells and enables real-time detection of exogenous Cu2+ within mitochondria of living cells. Mito-Cu (II) achieves "on-off-on" fluorescence switching through sequential exposure to Cu2+ and ethylenediaminetetraacetic acid (EDTA) (HY-Y0682). Its fluorescence is quenched after forming a 1:1 complex with Cu2+, and the fluorescence recovers when Cu2+ is chelated by EDTA.
    Mito-Cu(II)
  • HY-P1729
    M-2420
    M-2420 is a fluorogenic substrate containing β-secretase site of the Swedish mutation of amyloid precursor protein (APP).
    M-2420
  • HY-D1324
    Cyanine5.5 hydrazide dichloride
    Cyanine5.5 hydrazide, an analog of Cyanine5.5 fluorophore, is a near-infrared (NIR) fluorescent dye. Cyanine5.5 hydrazide is used for labeling of biomolecules through the condensation between the hydrazide groups and the carbonyl groups. (λex=684 nm, λem=710 nm).
    Cyanine5.5 hydrazide dichloride
  • HY-D0610
    Disperse Violet 33
    Disperse Violet 33 is a violet dye commonly used for fiber dyeing.
    Disperse Violet 33
  • HY-D1616
    5-Bromo-5'-methyl BAPTA tetramethyl ester
    5-Bromo-5'-methyl BAPTA tetramethyl ester is a derivative of BAPTA, which is a calcium indicator suitable for measurement of relatively high level of calcium.
    5-Bromo-5'-methyl BAPTA tetramethyl ester
Cat. No. Product Name / Synonyms Application Reactivity