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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-128868G
    FITC-Dextran (MW 150000)
    FITC-Dextran (MW 150000) is a fluorescent probe for fluorescein isothiocyanate (FITC) dextran (Ex=491 nm; Em=518 nm). FITC-Dextran (MW 150000) can be used as a marker to reveal heat shock-induced cell damage and to study the early and late stages of apoptosis. FITC-Dextran (MW 150000) can be used in perfusion studies in animals or in fluorescence microlymphography, to study processes that affect the permeability of the blood brain barrier (BBB). FITC-Dextran (MW 150000) can be used as fluorescent probe to study cell permeability.
    FITC-Dextran (MW 150000)
  • HY-D1434
    FM1-43
    FM1-43 is a very lipophilic, water-soluble styrene dyes, can specifically bind to cell membranes and inner membrane organelles to produce fluorescence. FM1-43 is widely used in endocytic and exospic membrane structure markers.
    FM1-43
  • HY-D0257
    Tartrazine
    		99.85%
    Tartrazine (Acid Yellow 23; FD&C Yellow No. 5) is an orally active azo acid dye, orange-yellow powder, soluble in water and turns yellow. Tartrazine is mainly used as a synthetic lemon yellow azo dye for food coloring. Tartrazine is the most stable colorant.Tartrazine induces mitochondria-mediated Apoptosis. Tartrazine can cause neurodevelopmental toxicity, cytotoxicity, and genotoxicity.
    Tartrazine
  • HY-N7131
    Coumarin 6
    		99.93%
    Coumarin 6, a fluorescent dye, is used as a fluorescent probe in a microparticle drug delivery system to conduct in vivo tracking, cell uptake, and transport mechanism studies of drug delivery systems (λexc=450 nm, λem=505 nm).
    Coumarin 6
  • HY-D0098
    Fluorescein-5-maleimide
    		98.10%
    Fluorescein-5-maleimide (N-(5-Fluoresceinyl)maleimide) is a fluorescent dye. Fluorescein-5-maleimide can be used to detect the redox state of thiols in eukaryotic cells. Fluorescein-5-maleimide can label peptides and is used to detect negatively charged nanoparticles. Fluorescein-5-maleimide can also label actin to explore its interaction with cardiac myosin-binding protein C (cMyBP-C), which helps in developing small molecule modulators for heart failure. Fluorescein-5-maleimide can screen mutant proteins that contain cysteine residues. The excitation wavelength of Fluorescein-5-maleimide is 494 nm, and the emission wavelength is 519 nm.
    Fluorescein-5-maleimide
  • HY-D2270
    Halo tag TMR
    Halo tag TMR is a red fluorescent dye composed of Halo tag ligand molecules and TMR. Halo tag can quickly and stably covalently bind to Halo protein with high specificity and affinity.
    Halo tag TMR
  • 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.
    TSQ
  • HY-100041
    Bromobimane
    		99.31%
    Bromobimane (Monobromobimane) is a nonfluorescent and converts into fluorescent products when reacts with thiols. Bromobimane has potential applications in labeling thiols.
    Bromobimane
  • HY-D0150
    Thiazole Orange
    		99.61%
    Thiazole Orange is an asymmetric anthocyanin dye that can be coupled with oligonucleotides (ONs) to prepare fluorescent hybridization probes. Thiazole Orange has been widely used in biomolecular detection and staining of DNA/ RNA in gels and can be used for reticulocyte analysis. Thiazole orange generates a significant fluorescence enhancement and high quantum yield when it binds with nucleic acids, especially RNA. Thiazole orange can permeate living cell membranes. Thiazole orange can use UV light for detection, but can also be detected with blue light. The excitation and emission of Thiazole orange are λex = 510 nm (488 nm and 470 nm also show strong excitation) and λem = 527 nm, respectively.
    Thiazole Orange
  • HY-D0717
    DAF-FM DA
    		98.32%
    DAF-FM DA (Diaminofluorescein-FM diacetate) is a fluorescent probe for the detection and bioimaging of nitric oxide (NO). DAF-FM DA spontaneously crosses the plasma membrane and is subsequently cleaved by esterases to generate intracellular DAF-FM (Ex/Em=495/515 nm).
    DAF-FM DA
  • HY-126793
    2′,7′-Dichlorofluorescein diacetate
    		98.95%
    2′,7′-Dichlorofluorescein diacetate (DCFH2-DA) is a cell-permeable fluorescent probe. 2′,7′-Dichlorofluorescein diacetate can be used to detect the generation of reactive oxygen intermediates and for assessing the overall oxidative stress in toxicological phenomenon.
    2′,7′-Dichlorofluorescein diacetate
  • HY-D0993
    Acridine Orange 10-Nonyl Bromide
    		99.50%
    Acridine Orange 10-Nonyl Bromide is a fluorescent probe for cardiolipin (λex: 489 nm, λem: 525 nm).
    Acridine Orange 10-Nonyl Bromide
  • HY-136976
    WST-1
    		≥98.0%
    WST-1 is a kind of water-soluble tetrazolium salt. WST induces the intracellular mitochondrial dehydrogenase to conduct NADH-dependent enzyme digestion reaction, releasing the water-soluble methyl benzene product. WST-1 can be used for the detection of cell proliferation and cytotoxicity, via the determination of the light absorption value at 450 nm.
    WST-1
  • HY-W074143
    Tris(4,7-diphenyl-1,10-phenanthroline)ruthenium(II) dichloride
    		99.74%
    Tris(4,7-diphenyl-1,10-phenanthroline)ruthenium(II) dichloride ([Ru(dpp)3]2+) is an electrochemiluminescent (ECL) probe that can be used to modify the electrode surface to detect sulfate (S2O82-) and oxalate. Tris(4,7-diphenyl-1,10-phenanthroline)ruthenium(II) dichloride can generate excited state species based on electrochemical reactions and release photons through irreversible redox reactions. When used as a cathode to detect persulfate, it can avoid the interference of hydrogen evolution. At the same time, the anode shows a wide linear range for oxalate. Tris(4,7-diphenyl-1,10-phenanthroline)ruthenium(II) dichloride can be used to construct a regenerable ECL sensor.
    Tris(4,7-diphenyl-1,10-phenanthroline)ruthenium(II) dichloride
  • HY-111496
    Sulfo-NHS-SS-Biotin sodium
    Sulfo-NHS-SS-biotin is a long-chain cleavable and cell-impermeant amine-reactive biotinylation reagent. Sulfo-NHS-SS-biotin can be used for the labeling and purifying of cell-surface protein.
    Sulfo-NHS-SS-Biotin sodium
  • HY-138226
    BODIPY 558/568 C12
    		98.42%
    BODIPY 558/568 C12 is a BODIPY dye. BODIPY dye is a small molecule dye with strong ultraviolet absorption ability, its fluorescence peak is relatively sharp, and the quantum yield is high. They are relatively insensitive to the polarity and pH of the environment and are relatively stable under different physiological conditions. Due to its structural asymmetry, BODIPY derives a variety of structural products. BODIPY lipid droplet dyes can well pass through the cell membrane into the cell, and localize the neutral lipids in the cell to specifically stain the lipid droplets, which can be used for labeling of live cells and fixed cells. Maximum excitation/emission wavelength: 558/568 nm.
    BODIPY 558/568 C12
  • HY-117695
    AQC
    AQC (6-Aminoquinolyl-N-hydroxysccinimidyl carbamate) is a reagent used for amino acid or protein sequence analysis by HPLC with fluorescence detection. AQC reacts with primary and secondary amino acids to yield fluorescent derivates, allowing amino acid detection at under-picomolar levels.
    AQC
  • HY-D1583
    Cyanine5 DBCO
    		99.65%
    Cyanine5 DBCO (DBCO-Cy5) is a low-toxicity azide reactive probe (NIR fluorescent dye), for imaging azide-labeled biomolecules via a copper-free "click-through" reaction. Cyanine5 DBCO has no apparent cytotoxicity or animal toxicity and shows no damage to the physiological functions of cells other than the target cells (azide-labeled cells). Cyanine5 DBCO can be used to label and track cells in vitro and in vivo (Ex=635 nm, Em=650-700 nm).
    Cyanine5 DBCO
  • HY-D1168
    Oil Red O
    Oil Red O is a fat-soluble diazol dye, with a maximum absorption at 518 nm. Oil Red O stains neutral lipids and cholesteryl esters but not biological membranes. Oil Red O can be used for detecting and quantifying hepatic steatosis in mouse liver biopsies. Oil Red O staining efficiently helps to visualize the radical changes that occur in tissues as metabolic disease occurs and progresses.
    Oil Red O
  • HY-129420
    WSP-5
    		99.31%
    WSP-5 is a fluorescent probe for fast detection of H2S in biological samples and cells. WSP-5 selectively and rapidly reacts with H2S and exhibits fluorescence through a reaction-based fluorescent turn-on strategy.
    WSP-5
Cat. No. Product Name / Synonyms Application Reactivity