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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-D1352A
    Sulfo-Cyanine7 NHS ester TEA
    Sulfo-Cyanine7 NHS ester (TEA) is an amine-reactive succinimide ester. Sulfo-Cyanine7 NHS ester (TEA) reagent allows to prepare sulfo-Cyanine7-labeled biomolecules, such as proteins, with ease. Dye labeled molecules can be subsequently used for various research and agent design related experiments.
    Sulfo-Cyanine7 NHS ester TEA
  • HY-D1873
    800CW acid
    		98.81%
    800CW acid is a near-infrared (NIR) dye that can be used for protein labeling. 800CW acid can be used for in vivo imaging studies.
    800CW acid
  • HY-D1304
    Alexa fluor 488 azide ditriethylamine
    Alexa fluor 488 azide ditriethylamine 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.
    Alexa fluor 488 azide ditriethylamine
  • 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-P3749
    Mca-(ala7,lys(dnp)9)-bradykinin
    		99.92%
    Mca-(ala7,lys(dnp)9)-bradykinin is a sensitive fluorogenic substrate for ECE-1 (endothelin-converting enzyme-1). The incorporation of a (7-methoxycoumarin-4-yl)acetyl (Mca) fluorescent group and a 2,4-dinitrophenyl (Dnp) quenching group has resulted in a large fluorescence increase upon substrate cleavage.
    Mca-(ala7,lys(dnp)9)-bradykinin
  • HY-126220
    KMG-301AM
    KMG-301AM is the acetoxy methyl esterified form of KMG-301. KMG-301AM successfully accumulates in mitochondria and then it is hydrolyzed to KMG-301. KMG-301 is an Mg2+-selective fluorescent probe functional in mitochondria in intact cells. Since the mitochondrial membrane is impermeable to KMG-301, it is not released upon depolarization of the mitochondrial membrane potential. KMG-301 can indicate changes in mitochondrial Mg2+ concentration and shows Mg2+ transport across the mitochondrial membrane in the early phases of a cellular model.
    KMG-301AM
  • 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
  • HY-D1633A
    4-Methylumbelliferyl-β-D-galactopyranoside 6-sulfate sodium
    		99.92%
    4-Methylumbelliferyl-β-D-galactopyranoside 6-sulfate sodium is a fluorescent dye. 4-Methylumbelliferyl-β-D-galactopyranoside 6-sulfate sodium can be used in the diagnosis of mucopolysaccharidosis IV A by detecting activity of galactose-6-sulphate sulphatase.
    4-Methylumbelliferyl-β-D-galactopyranoside 6-sulfate sodium
  • HY-W001952
    6-Bromo-2-naphthol
    		99.75%
    6-Bromo-2-naphthol is an RTP (real-time polymerase chain reaction) probe that forms a 1:1 or 2:1 complex with β-cyclodextrin (β-CD). 6-Bromo-2-naphthol is capable of real-time monitoring of PCR reactions and quantification of specific nucleic acid sequences. RTP probes are a class of small DNA or RNA sequences labeled with fluorescent dyes and quencher molecules, which can be widely used in gene expression analysis, SNP genotyping, and pathogen detection. 6-Bromo-2-naphthol embeds into the cyclodextrin cavity through hydrophobic interactions, inhibits the oxygen quenching effect, and emits a phosphorescent signal at room temperature. 6-Bromo-2-naphthol can also be used as an intermediate for the synthesis of antibacterial azo dyes, and its derivatives show antibacterial activity against Staphylococcus aureus, Escherichia coli and other bacteria.
    6-Bromo-2-naphthol
  • HY-D2346
    HBmito Crimson
    HBmito Crimson is a deep red fluorescent probe (λex: 658 nm, λem: 678 nm) for the inner mitochondrial membrane. HBmito Crimson is a cell membrane-permeable probe with high selectivity for the mitochondrial inner membrane, suitable for specific fluorescence staining of the inner mitochondrial membrane in living cells. HBmito Crimson has high photostability and brightness, suitable for long-term dynamic fluorescence imaging.
    HBmito Crimson
  • HY-W026772
    Fluorene
    		99.35%
    Fluorene is an orally active polycyclic aromatic hydrocarbon (PAH) and a precursor to other fluorene-based compounds. Fluorene and its derivatives serve as dye precursors for fluorene synthesis. In A549 cells, Fluorene induces oxidative stress and inflammatory responses by increasing ROS and SOD generation, exacerbating lipid peroxidation, modulating antioxidant enzyme activity, and upregulating the expression of pro-inflammatory factors TNF-α and IL-6. In vivo, Fluorene exhibits anxiolytic activity. Fluorene holds potential for research in inflammation and neurological disorders.
    Fluorene
  • HY-Y0699
    Methyl red
    		98.67%
    Methyl red is a pH-sensitive acid-base indicator and colorimetric reagent with a pKa of 5.1. Methyl red achieves visual judgment of the titration endpoint through reversible structural changes of protonation (red, pH <4.4) and deprotonation (yellow, pH >6.2). Methyl red is widely used in acid-base titration in chemical analysis and buffer pH monitoring in biochemistry.
    Methyl red
  • HY-157036
    INSA
    		98.82%
    INSA is a a pH-sensitive fluorescent probe. INSA can simultaneously light up mitochondria (red emission) and lysosomes (green emission) for their internal pH differences.
    INSA
  • HY-131409
    D-Val-Leu-Lys-pNA dihydrochloride
    		99.55%
    D-Val-Leu-Lys-pNA dihydrochloride (D-VLK-pNA dihydrochloride) is a colorimetric substrate for plasminolytic activity. D-Val-Leu-Lys-pNA dihydrochloride is catalytically bound and hydrolyzed by plasmin to release p-nitroaniline (pNA), which can be detected colorimetrically at 405 nm as a measure of plasminolytic activity.
    D-Val-Leu-Lys-pNA dihydrochloride
  • HY-D0220
    Toluidine Blue
    Toluidine Blue (Toluidine Blue O) is an alkaline quinonimine dye (vivo dye) with high affinity for acidic tissue components, staining nuclei blue and polysaccharides purple. Toluidine Blue shows heterostaining properties for mast cells, mucins and chondrocytes. Toluidine Blue can stain different components of plant tissues and cells in different colours. Toluidine Blue is also used as a diagnostic aid to identify malignant lesions, such as cancer.
    Toluidine Blue
  • HY-D1050
    DNP-X, SE
    		98.47%
    DNP-X, SE (6-(2,4-Dinitrophenyl)aminohexanoic acid, succinimidyl ester), the DNP-X acid modified by succinimidyl ester, is an amine-reactive building block for developing a probe, which can be recognized by anti-DNP antibodies. DNP-X, SE (6-(2,4-Dinitrophenyl)aminohexanoic acid, succinimidyl ester) is also an excellent amine-reactive FRET quencher paired with Trp or Tyr.
    DNP-X, SE
  • HY-115691
    STY-BODIPY
    STY-BODIPY (Styrene-BODIPY) is a styrene-conjugated fluorogenic probe for measuring radical-trapping antioxidant (RTA) activity.
    STY-BODIPY
  • HY-D0074
    Prodan
    		99.71%
    Prodan, a solvatochromic fluorophore, has been used as a microenvironment-sensitive membrane reporter. Based on the chemistry of Prodan, fluorescent nucleosides are designed and synthesized.The fluorescent nucleosides sensitively varied the Stokes shift values depending on the orientational polarizability of the solvent.
    Prodan
  • HY-101890
    Dabsyl chloride
    		98.54%
    Dabsyl chloride is an amine derivatizing agent, able to give rise to stable products that can be easily monitored spectrophotometrically at 460 nm; Dabsyl chloride also used for labeling amino acids.
    Dabsyl chloride
Cat. No. Product Name / Synonyms Application Reactivity