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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-D0090
    MQAE
    		99.84%
    MQAE is a chloride ion (Cl-) fluorescent probe that can be used to measure chloride concentrations. The fluorescence intensity of MQAE decreases proportionally as Cl- ions increase. MQAE has high cell permeability and is suitable for fluorescence detection such as confocal microscopy and flow cytometry (Ex/Em=350/460 nm).
    MQAE
  • HY-D0040
    Calcein
    Calcein is a fluorescent dye and self-quenching probe, used as an indicator of lipid vesicle leakage, and also as a complexometric indicator for titration of calcium ions with EDTA, and for fluorometric determination of calcium. Calcein can also be used as a model drug for evaluating efficiency and bioavailability of drug delivery systems.
    Calcein
  • HY-101899
    Monochlorobimane
    		99.86%
    Monochlorobimane (Chlorobimane) is a fluorescent dye (λex=380 nm, λem=470 nm) to measure glutathione (GSH) in cellular assays.
    Monochlorobimane
  • HY-D0822
    CY3
    		99.87%
    Cy3 (Sulfo-Cyanine3) is an orange-fluorescent label for protein and nucleic acid (λex=554, λem=568).
    CY3
  • HY-Y0016
    Rhodamine B
    		98.0%
    Rhodamine B is a staining fluorescent dye, commonly used for dyeing textiles, paper, soap, leather, and agents.
    Rhodamine B
  • HY-112641A
    AkaLumine hydrochloride
    		99.92%
    AkaLumine hydrochloride is a D-luciferin (HY-12591A) analogue with a Km of 2.06 μM for recombinant firefly luciferase (Fluc) protein. AkaLumine hydrochloride emits near-infrared (NIR) light (λmax=677 nm) in reactions with native Fluc. AkaLumine hydrochloride has high tissue-penetration and increases detection sensitivity from deep-tissue targets.
    AkaLumine hydrochloride
  • HY-B0324A
    Crystal Violet
    Crystal Violet, also known as Gentian violet, methyl violet 10B, is a triphenyl-methane, an alkaline dye that binds to DNA in the nucleus of a cell, staining it a deep purple. It is often used for Gram staining to classify bacteria, or for cell or histological staining[1].
    Crystal Violet
  • HY-15902
    ABTS diammonium salt
    		99.89%
    ABTS diammonium salt (AzBTS-(NH4)2) is a substrate for horseradish peroxidase (HRP) conjugate. ABTS diammonium salt can be used to evaluate antioxidant capacity.
    ABTS diammonium salt
  • HY-W019823
    4-MUNANA
    		98.08%
    4-MUNANA is a substrate of influenza virus neuraminidase (NA) with high selectivity and irreversible reaction. In the enzymatic reaction, 4-MUNANA is hydrolyzed by NA to generate fluorescent 4-methylumbelliferone (4-MU). By detecting the fluorescence intensity of 4-MU, quantitative analysis of NA activity can be achieved. 4-MUNANA can be used in influenza-related research, such as screening NA inhibitors, developing new anti-influenza drugs, and studying the infection mechanism of influenza viruses.
    4-MUNANA
  • HY-151857
    TAMRA azide, 5-isomer
    		98.60%
    TAMRA azide, 5-isomer is a click chemical containing azide groups that can be used as a linker for the orange dye TAMRA. The azide group of TAMRA Azide, 5-isomer enables copper-catalyzed click chemical reactions with alkynes, DBCO, and BCN. 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.
    TAMRA azide, 5-isomer
  • HY-D0208
    Fluorescein sodium
    Fluorescein (Uranine) sodium is widely used as a fluorescent tracer in medicinal and biological applications and tumor infected tissues tracer. Fluorescein (Uranine) sodium is a representative green fluorophore that has been widely used as a scaffold of practically useful green fluorescent probes.
    Fluorescein sodium
  • HY-126561
    Green CMFDA
    		99.82%
    Green CMFDA is a cell-permeable fluorescent probe with Em of 514 nm and Ex of 485 nm and can be used as a cell tracer. Green CMFDA can be cleaved by non-specific esterases common in living cells, producing a fluorescent compound, fluorescein, visible using a fluorescent microscope.
    Green CMFDA
  • HY-15142R
    Doxorubicin hydrochloride (Standard)
    Doxorubicin hydrochloride (Standard) is the analytical standard of Doxorubicin hydrochloride. This product is intended for research and analytical applications. Doxorubicin (Hydroxydaunorubicin) hydrochloride, a cytotoxic anthracycline antibiotic, is an anti-cancer chemotherapy agent. Doxorubicin hydrochloride is a potent human DNA topoisomerase I and topoisomerase II inhibitor with IC50s of 0.8 μM and 2.67 μM, respectively. Doxorubicin hydrochloride reduces basal phosphorylation of AMPK and its downstream target acetyl-CoA carboxylase. Doxorubicin hydrochloride induces apoptosis and autophagy.
    Doxorubicin hydrochloride (Standard)
  • HY-111382
    Diphenylterazine
    		98.93%
    Diphenylterazine (DTZ) is a bioluminescence agent. Diphenylterazine alone yielded very little background, leading to excellent signal-to-background ratios.
    Diphenylterazine
  • HY-D0831
    WST-8
    		99.69%
    WST-8 is a water-soluble tetrazolium dye, WST-8 enhances sensitivity of the WST-8-based assay over the conventional MTS-based assay.
    WST-8
  • HY-U00451
    ATP-Red 1
    		98.0%
    ATP-Red 1 is a multisite-binding switchable fluorescent probe, and can selectively and rapidly responds to intracellular concentrations of ATP in living cells (Ex/Em = 510/590 nm).
    ATP-Red 1
  • HY-D1421
    PKH 67
    		≥99.0%
    PKH67 is a fluorescent cell binding dye with green fluorescence. PKH67 can stain the cell membrane and the Ex/Em is 490/502 nm. PKH67 is often used in combination with the non-specific red fluorescent dye PKH26 (Ex/Em=551/567 nm) to label cells, detect cell proliferation in vitro, and trace cells in vitro and in vivo.
    PKH 67
  • HY-119287
    TSQ
    		99.50%
    TSQ is a cytosolic zinc ion fluorescence probe that is membrane permeable and can be used for intracellular imaging of zinc proteins (λmax ~470 nm). TSQ can combine with Zn2+ in the presence of Ca2+ and Mg2+ to produce blue fluorescence (Ex/Em = 334/495 nm).
    TSQ
  • HY-15925
    Nitro blue tetrazolium chloride
    		99.82%
    Nitro blue tetrazolium chloride (NBT) is a substrate for dehydrogenases; is used with the alkaline phosphatase substrate 5-Bromo-4-Chloro-3-Indolyl Phosphate (BCIP) in western blotting and immunohistological staining procedures.
    Nitro blue tetrazolium chloride
  • HY-128692
    Lucifer Yellow CH dilithium salt
    		99.67%
    Lucifer Yellow CH dilithium salt 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 dilithium salt
Cat. No. Product Name / Synonyms Application Reactivity