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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-W040226
    Indigo carmine
    		98.0%
    Indigo carmine is an efficient reagent for the determination of ozone by chemlluminescence (CL).
    Indigo carmine
  • HY-D2869
    Ac-H-FluNox
    		99.88%
    Ac-H-FluNox is an acetylated cell-compatible prodrug of H-FluNox (HY-D2339). Ac-H-FluNox undergoes intracellular hydrolysis of its acetyl group by esterases to generate H-FluNox, which then undergoes a deoxygenation reaction with labile heme to form a fluorescent product. Ac-H-FluNox detects fluctuations of labile heme in living cells, acute labile heme release upon nitric oxide stimulation, and accumulation of labile heme following inhibition of heme export proteins.
    Ac-H-FluNox
  • HY-D1630
    4-Di-10-ASP
    		98.0%
    4-Di-10-ASP is a fluorescent lipophilic tracer (Excitation 485 nm; Emission 620 nm). 4-Di-10-ASP can be used to stain phospholipid membranes in a specific manner.
    4-Di-10-ASP
  • HY-D1804
    Vari Fluor 680-Streptavidin
    Vari Fluor 680-Streptavidin is a dye marker of Vari Fluor-streptavidin consisting of labeling streptavidin with a Vari Fluor series of fluorescent probes. Streptavidin is a high-affinity tetramer protein, each tetramer consisting of four identical streptavidin subunits. Streptavidin binds to biotin specifically via a reversible non-covalent effect. Streptavidin can achieve rapid and efficient detection of biotin markers, and is often used in immunofluorescence (IF), enzyme-linked immunosorbent assay (ELISA), immunohistochemical staining (IFH), in situ hybridization (ISH) and other experiments. Ex/Em=680 nm/701 nm.
    Product Concentration: 0.8 mg/mL
    Vari Fluor 680-Streptavidin
  • HY-W024271
    8-Hydroxyjulolidine-9-carboxaldehyde
    		99.93%
    8-Hydroxyjulolidine-9-carboxaldehyde (9-Formyl-8-hydroxyjulolidine) is a highly selective fluorescent probe for hydrogen sulfide (S2−) and silicate (SiO32−). 8-Hydroxyjulolidine-9-carboxaldehyde operates via a mechanism of blocking intramolecular charge transfer (ICT), exhibiting significant fluorescence enhancement in the presence of weak acid ions. 8-Hydroxyjulolidine-9-carboxaldehyde is promising for research of fluorescence imaging of hydrogen sulfide within living cells.
    8-Hydroxyjulolidine-9-carboxaldehyde
  • HY-153231A
    eGFP mRNA-LNP (500 ng/μL)
    eGFP mRNA-LNP (500 ng/μL) is a lipid nanoparticle (LNP) containing eGFP mRNA. eGFP mRNA-LNP carries Enhanced Green Fluorescent Protein (eGFP), which will express green fluorescent protein after entering the cell. eGFP is commonly used as a reporter gene detectable by fluorescence microscopy or flow cytometry (excitation wavelength = 488 nm; emission wavelength = 535/40 bandpass). eGFP mRNA-LNP can be used for RNA delivery, translation efficiency and cell viability.
    eGFP mRNA-LNP (500 ng/μL)
  • HY-DY1021
    DiSC3(5) (solution)
    DiSC3 (5) (solution) is a fluorescent probe commonly used as a tracer dye to evaluate mitochondrial membrane potential. The excitation/emission wavelength of DiSC3 (5) is up to 622/670 nm. DiSC3 (5) can inhibit the respiratory system associated with mitochondrial NAD, and the IC50 value is 8 μM. DiSC3 (5) in the presence of Na+/K+-ATPase inhibitor ouabain 2 can induce membrane hyperpolarization of Ehrlich ascites tumor cells.
    Solvent and concentration: DMSO: 1 mM
    The 1 mL volume is defined as the base specification. All larger sizes correspond to incremental volumes of this base.
    DiSC3(5) (solution)
  • HY-139337
    SMCy5.5
    SMCy5.5 is a SMCy dye (ex. 638 nm; em. 705 nm). The high brightness of SMCy5.5 allows for effective tracking and imaging of lipid droplet exchange between adipocytes. SMCy5.5 can be used for lipid droplet labeling studies.
    SMCy5.5
  • HY-137873
    4-Methylumbelliferyl-α-D-Glucopyranoside
    		99.99%
    4-Methylumbelliferyl-α-D-Glucopyranoside (4-Methylumbelliferyl-α-D-Glucose) is a fluorescent substrate for α-glucosidase, which releases the fluorescent moiety 4-methylumbelliferyl (4-MU) upon cleavage. 4-MU has pH-dependent fluorescence excitation activity, with excitation wavelengths of 320 nm at low pH (1.97-6.72) and 360 nm at high pH (7.12-10.3), respectively. The emission wavelength of 4-Methylumbelliferyl-α-D-Glucopyranoside increases with decreasing pH, ranging from 445-455 nm. 4-Methylumbelliferyl-α-D-Glucopyranoside can be used as a biomarker for Fabry and Pompe diseases to quantify α-glucosidase activity in infant blood spot samples.
    4-Methylumbelliferyl-α-D-Glucopyranoside
  • HY-151667
    Biotin-C5-Azide
    		98.92%
    Biotin-C5-Azide (DecarboxyBiotin-N3) is a biotin reagent and can be used to prepare biotinylated conjugates. Biotin-C5-Azide 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.
    Biotin-C5-Azide
  • HY-131029
    Janelia Fluor® 646, Maleimide
    Janelia Fluor® 646, Maleimide (JF646, Maleimide) is a red fluorescent dye that contains a maleimide group. JF646, Maleimide 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, Maleimide
  • HY-151711
    Sulfo-Cy5.5 Azide
    Sulfo-Cy5.5 Azide is a click chemistry reagent containing an azide group. Sulfo-Cy5.5 Azide is also a water-soluble dye (Ex=673 nm, Em=707 nm), which designed to label sensitive molecules such as peptides, proteins and oligonucleotides. 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.
    Sulfo-Cy5.5 Azide
  • HY-NP028
    Keyhole Limpet Hemocyanin-FITC
    Keyhole Limpet Hemocyanin-FITC induces both T-cell-dependent and T-cell-independent immune responses.
    Keyhole Limpet Hemocyanin-FITC
  • HY-D0060
    4-Di-2-ASP
    		99.62%
    4-Di-2-ASP, a styryl pyridinium fluorescent dye, is a vital mitochondrial marker. 4-Di-2-ASP shows reliable and specific labelling of pulmonary NEBs (neuroepithelial bodies).
    4-Di-2-ASP
  • HY-158779
    Sulfane sulfur probe 4
    Sulfane sulfur probe 4 (SSP4) is a fluorescent probe used to detect sulfane sulfur species (Ex/Em=494/515 nm). Sulfane sulfur probe 4 exhibits high sensitivity in detecting sulfane sulfur, even in the presence of other substances such as homocysteine, methionine, cysteine, glutathione, N-acetyl-L-cysteine, glycine, tyrosine, tryptophan, arginine, and metal ions (Fe2+, Fe3+, Mg2+, Ca2+, and Zn2+).
    Sulfane sulfur probe 4
  • HY-D0142
    Pyrene-1,3,6,8-tetrasulfonic acid tetrasodium
    		≥99.0%
    Pyrene-1,3,6,8-tetrasulfonic acid tetrasodium is a fluorescent dye and pH indicator, also as a ligand of multifunctional metal-organic framework. Pyrene-1,3,6,8-tetrasulfonic acid tetrasodium has been used to detect CO2 release. Pyrene-1,3,6,8-tetrasulfonic acid tetrasodium acts as a water-soluble fluorescent dye for fluorescence quenching assays monitoring gramicidin ion-channel activity.
    Pyrene-1,3,6,8-tetrasulfonic acid tetrasodium
  • HY-D2919
    DMN-Tre
    		98.87%
    DMN-Tre is a conjugate of a solvatochromic fluorescent dye and trehalose. DMN-Tre takes advantage of the substrate promiscuity of the endogenous antigen 85 protein complex in mycobacteria to be metabolically integrated into the hydrophobic mycobacterial membrane. Once entering this hydrophobic environment, the linked DMN dye fluorescence is "turned on", enabling specific labeling. DMN-Tre can be used to reflect bacterial metabolic activity and support physiological studies of Mycobacterium tuberculosis.
    DMN-Tre
  • HY-169798
    1,9-Dimethylmethylene blue
    		98.06%
    1,9-Dimethylmethylene blue is a photosensitizer, virus inactivator and hemoglobin oxidant derived from methylene blue. When activated, 1,9-Dimethylmethylene blue generates reactive oxygen species including singlet oxygen, and acts as a metachromatic dye. When activated in monomeric or dimeric form, 1,9-Dimethylmethylene blue induces photoinactivation of R17 phage and vesicular stomatitis virus and oxidizes hemoglobin via non-singlet oxygen reactive oxygen species or singlet oxygen-mediated pathways, respectively. The monomeric form, with higher nucleic acid affinity, achieves virus inactivation under specific conditions without forming methemoglobin. 1,9-Dimethylmethylene blue binds to substances such as glycosaminoglycans to produce color changes. Although it is susceptible to interference from non-glycosaminoglycan components in urine, it is still applicable to spectrophotometric analysis for glycosaminoglycan quantification. With these unique photochemical and binding properties, 1,9-Dimethylmethylene blue is widely used in studies of viral infections and related biochemical analyses.
    1,9-Dimethylmethylene blue
  • HY-W009454
    Potassium p-nitrophenyl sulfate
    		99.89%
    Potassium p-nitrophenyl sulfate (4-Nitophenyl Sulfate potassium) serves as a chromogenic substrate for arylsulfatases. Potassium p-nitrophenyl sulfate releases nitrophenol under the cleavage action of arylsulfatases, and the activity of arylsulfatases can be quantitatively determined via colorimetric detection at 400 nm. Potassium p-nitrophenyl sulfate is commonly used in enzyme inhibition assays and metabolite analog-related studies.
    Potassium p-nitrophenyl sulfate
  • HY-D2875
    5-FITC tyramide
    		Chemical
    5-FITC tyramide is a green fluorescent dye composed of FITC (HY-66019) and tyramide (Ex=488 nm, Em=525 nm). 5-FITC tyramide is utilized as reporter fluorescent substrate of horseradish peroxidase (HRP)-catalyzed deposition for tyramide signal amplification (TSA). 5-FITC tyramide can be used for multiplex immunohistochemistry (mIHC).
    5-FITC tyramide
Cat. No. Product Name / Synonyms Application Reactivity