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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-12489
    Ponceau S
    		98.0%
    Ponceau S (Acid Red 112) is a non-specific protein dye commonly used as a stain for Western blot. Ponceau S is used in an acidic aqueous solution that is compatible with antibody-antigen binding and dyes the proteins on the membrane red.
    Ponceau S
  • HY-D1320
    Cyanine5 azide chloride
    		99.63%
    Cyanine5 azide chloride is a potent fluorescent dye. Cyanine5 azide chloride can be reacted with terminal alkynes via a copper-catalyzed click reaction (CuAAC). (λex=646 nm, λem=662 nm). It contains an azide group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing alkyne groups. It can also undergo ring strain-promoted alkyne-azide cycloaddition (SPAAC) with molecules containing DBCO or BCN groups.
    Cyanine5 azide chloride
  • HY-D1429
    ER-Tracker Blue-White DPX
    ER-Tracker dye is a derivative of BODIPY series dyes coupled with Glibenclamide (HY-15206), highly selective binding to the endoplasmic reticulum, non-toxic to cells at low concentrations, this type of dye is an environmentally sensitive probe, and formaldehyde treatment can still retain part of the fluorescence, with high fluorescence life, good extinction coefficient and other characteristics. Glibenclamide is an atp-dependent K+ channel blocker (Kir6, KATP) and CFTR Cl-channel blocker that binds in the endoplasmic reticulum. ER-Tracker is not suitable for staining fixed cells. Staining followed by fixation is possible, but cells fixed with aldehydes will only retain partial fluorescence (Ex/Em = 374/ 430-640 nm).
    ER-Tracker Blue-White DPX
  • HY-114616
    PBB3
    PBB3 is a tracer of tau PET. PBB3 can be used to detect levels of tau protein in Alzheimer's disease and non-Alzheimer's disease.
    PBB3
  • HY-15930A
    TMB dihydrochloride
    		99.83%
    TMB dihydrochloride is the dihydrochloride form of TMB (HY-15930). TMB dihydrochloride is a non-toxic, non-mutagenic, colorless dye that is also used as a chromogenic agent in enzyme detection systems based on horseradish peroxidase (HRP). TMB dihydrochloride can function as a photoacoustic probe for reactive oxygen and nitrogen species (ROS/RNS), reacting with hypochlorite, hydrogen peroxide, singlet oxygen, and nitrogen dioxide to produce blue oxidation products. TMB dihydrochloride can detect the singlet oxygen produced by the outer membrane of Escherichia coli ATCC 25922.
    TMB dihydrochloride
  • HY-D0169A
    Phenol Red sodium salt
    Phenol red (Phenolsulfonephthalein) sodium salt is a pH indicator dye. Phenol Red sodium salt is also an antagonist of rat P2X1R. Phenol Red sodium salt enhances the halogenating activity of myeloperoxidase. Phenol Red sodium salt shows a distinct color change from pink to yellow in a positive pH reaction.
    Phenol Red sodium salt
  • HY-D2906
    Alexa fluor 647 maleimide
    Alexa fluor 647 maleimide is a bright, far-red-emitting fluorescent dye for labeling of protein SH groups (Ex/Em = 656/670 nm). Alexa fluor 647 maleimide can be used to attach AF 647 fluorophore to proteins and peptides containing cysteine residues, as well as to other thiolated molecules (such as thiol-containing oligonucleotides). Alexa Fluor 647 maleimide is promising for research of cell biology, neuroscience, and disease diagnostics.
    Alexa fluor 647 maleimide
  • HY-130735
    Janelia Fluor® 646, SE
    		99.67%
    Janelia Fluor 646, SE (JF646, SE) is a red fluorescent dye can be used in cellular imaging. Janelia Fluor products are licensed under U.S. Pat. Nos. 9,933,417, 10,018,624 and 10,161,932 and other patents from Howard Hughes Medical Institute.
    Janelia Fluor® 646, SE
  • HY-145746
    Sulfo-Cy5 azide
    		98.97%
    Sulfo-Cy5 azide is a near-infrared fluorescent probe with favorable click chemistry reactivity. Sulfo-Cy5 azide enables fluorescence imaging, tissue and cellular visualization of PD-L1 in tumors, and site-specific modification of anti-PD-L1 antibodies. Sulfo-Cy5 azide has been employed for RNA labeling and imaging. Sulfo-Cy5 azide can be conjugated to targeting agents for fluorescence imaging in atherosclerosis and breast cancer models (Ex/Em = 645/670 nm).
    Sulfo-Cy5 azide
  • HY-D2189
    IR 700DX
    IR 700DX (IR 700DX NHS ester) is a near-infrared (NIR) phthalocyanine dye with extremely high photostability and fluorescence intensity. IR 700DX binds to biomolecules. IR 700DX has excellent water solubility, large extinction coefficient, high fluorescence quantum yield, and does not aggregate in high ionic strength buffers. IR 700DX can be used as a highly flexible photosensitizer.
    IR 700DX
  • HY-129763
    Di-4-ANEPPS
    		99.00%
    Di-4-ANEPPS is a voltage-sensitive dye that acts on voltage-gated ion channels (such as sodium channels) and inhibits sodium current, significantly reducing sodium current density, although specific values like IC50 remain unclear. It mainly binds to the voltage-sensitive regions on the cell membrane, changing its fluorescence properties to reflect membrane potential changes and thus affecting the function of ion channels to exert its activity. This substance can be used in cardiovascular research, such as the electrophysiology of cardiomyocytes, myocardial ischemia, and the effects of drugs on cardiomyocytes. It is of great value in evaluating drug cardiotoxicity and exploring the mechanisms of arrhythmias.
    Di-4-ANEPPS
  • HY-D1176
    Calcium Green 1AM
    Calcium Green 1AM is a cell-permeant fluorescent calcium indicator (Excitation 506 nm; Emission 531 nm). Calcium Green 1AM is converted to the fluorescent calcium indicator by intracellular esterases.
    Calcium Green 1AM
  • HY-D1078
    5(6)-Carboxy-2',7'-dichlorofluorescein diacetate
    5 (6)-Carboxy-2',7'-dichlorofluorescein diacetate is a fluorescein-based reactive oxygen species (ROS) probe and also a MRP2 substrate. 5 (6)-Carboxy-2',7'-dichlorofluorescein diacetate serves as a substrate for intracellular esterases, which cleave its acetate groups to generate a fluorescent product capable of detecting intracellular ROS. 5 (6)-Carboxy-2',7'-dichlorofluorescein diacetate is ATP-dependent and is transported via a single MRP2 binding site; it competes with LTC4 for MRP2 binding sites and inhibits MRP2-mediated LTC4 transport (Ex/Em = 496/525 nm).
    5(6)-Carboxy-2',7'-dichlorofluorescein diacetate
  • HY-15922A
    Luminol sodium salt
    		98.87%
    Luminol sodium salt is a chemical that exhibits chemiluminescence with pKa values of 6.74 and 15.1. Luminol sodium salt exhibits chemiluminescence (CL) at 425 nm λmax. Luminol sodium salt is commonly used in forensics as a diagnostic tool for the detection of blood stains.
    Luminol sodium salt
  • HY-D0981
    7-Amino-4-(trifluoromethyl)coumarin
    		99.30%
    7-Amino-4-(trifluoromethyl)coumarin (Coumarin 151) is a fluorescent marker for the sensitive detection of proteinases. The excitation and emission wavelengths are 400 and 490 nm, respectively.
    7-Amino-4-(trifluoromethyl)coumarin
  • HY-DY1006
    Propidium Iodide (solution)
    Propidium Iodide (PI) (solution) is a nuclear staining agent that stains DNA. Propidium Iodide is an analogue of ethidine bromide that emits red fluorescence upon embedding in double-stranded DNA. Propidium Iodide cannot pass through living cell membranes, but it can pass through damaged cell membranes to stain the nucleus. Propidium Iodide has a fluorescence wavelength of 493/617 nm and a wavelength of 536/635 nm after Mosaic with DNA. Propidium Iodide is commonly used in the detection of apoptosis (apoptosis) or necrosis (necrosis) , and is often used in flow cytometry analysis.
    Solvent and Concentration: Sterile water: 1 mg/mL
    The 1 mL volume is defined as the base specification. All larger sizes correspond to incremental volumes of this base.
    Propidium Iodide (solution)
  • HY-W356116
    C6 NBD Ceramide
    		99.33%
    C6 NBD Ceramide is a Golgi apparatus fluorescent probe with cell membrane permeability. C6 NBD Ceramide can be used for fast and convenient green fluorescent labeling of Golgi in living and fixed cells, and can be used to observe changes in Golgi morphology in living cells (Ex=466 nm, Em=536 nm). C6-NBD-ceramide is metabolized to fluorescent sphingomyelin and glucosylceramide, can be used for the study of sphingolipid transport and metabolic mechanism.
    C6 NBD Ceramide
  • HY-D1555
    Cyanine7 DBCO
    Cyanine7 DBCO (Cy7 DBCO) is a near-infrared fluorescent dye and an efficient bio-orthogonal quencher. Cyanine7 DBCO is formed by covalent connection of the near-infrared fluorescent dye Cy7 and the dibenzocyclooctyne (DBCO) functional group. After reacting with N3-Cy5-COOH, the fluorescence of Cy5 decreases by 90% within 90 minutes, and rapid signal attenuation can be observed within 2-5 minutes. Cyanine7 DBCO can be used for the study of deep tissue imaging and receptor-targeted therapeutic strategies.
    Cyanine7 DBCO
  • HY-135415
    Cyanine5.5 NHS ester chloride
    Cyanine5.5 NHS ester chloride is a reactive dye for the labeling of proteins, and antibodies and small molecular compounds.
    Cyanine5.5 NHS ester chloride
  • HY-B1539A
    Fuchsine base monohydrochloride
    		99.53%
    Fuchsine base (Magenta base; Basic Fuchsin) monohydrochloride is a triaminotriphenylmethane dye. Fuchsine base monohydrochloride has anesthetic, bactericidal and fungicidal properties. Fuchsine base monohydrochloride can be used for the staining of collagen, muscle, mitochondria and tuberculosis. Fuchsine base monohydrochloride is commonly used as a counterstain in Gram staining.
    Fuchsine base monohydrochloride
Cat. No. Product Name / Synonyms Application Reactivity