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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-133883
    Cyanine7.5 amine
    Cyanine7.5 amine is a near-infrared Cy7.5-based dye and also a substrate for amide bond coupling (Ex/Em = 788 nm/808 nm). Cyanine7.5 amine contains a free amino group and can be used for coupling with activated carboxylic acid derivatives.
    Cyanine7.5 amine
  • HY-DY1100
    WST-1 (solution)
    WST-1 (solution) 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.
    Solvent and concentration: ddH2O: 10 mg/mL
    WST-1 (solution)
  • HY-D1065
    NIR-H2O2
    NIR-H2O2 is a cell-permeable near-infrared (NIR) fluorescent turn-on sensor. NIR-H2O2 has both absorption and emission in the NIR region. NIR-H2O2 responds to H2O2 with a large turn-on NIR fluorescence signal upon excitation in the NIR region. NIR-H2O2 is capable of imaging endogenously produced H2O2 in living cells and mice.
    NIR-H2O2
  • HY-118320
    Alizarine Yellow R
    		98.0%
    Alizarine Yellow R (Mordant orange 1), Salicylic acid derivative (HY-B0167), is an azo dye. Alizarine Yellow R is used as a pH indicator and a biological stain in chemical examinations and dyeing industries.
    Alizarine Yellow R
  • HY-155322
    Cy3-PEG2-TCO
    Cy3-PEG2-TCO is a dye derivative of Cyanine 3 (Cy3) (HY-D0822) containing 2 PEG units. Cy3-PEG2-TCO can use its own TCO group to perform an inverse electron demand Diels-Alder reaction (iEDDA) with molecules with Tetrazine groups.
    Cy3-PEG2-TCO
  • HY-D1322
    Cyanine5.5 NHS ester tetrafluoroborate
    		98.37%
    Cyanine5.5 NHS ester tetrafluoroborate belongs to the cyanine dye series and is a common fluorescent marker for biomolecules that can interact with biomolecules. Cyanine dyes may also bind to double-helical DNA through intercalation and exhibit enhanced fluorescence upon binding.
    Cyanine5.5 NHS ester tetrafluoroborate
  • HY-D1863
    sulfo-Cy7.5 amine
    sulfo-Cy7.5 amine is a dye derivative of Cyanine 7.5 (Cy7.5) (HY-D0926) bearing an amine group. The sulfonate ion increases the water solubility of the compound, making it suitable for use in aqueous solutions. Cy7.5 is a near-infrared fluorescent dye commonly used for biolabeling and cell imaging. The amine functionality of sulfo-Cy7.5 amine can react with carboxyl groups to form covalent bonds. Sulfo-Cy7.5 amine can bind to biomolecules such as proteins and antibodies to track their location and dynamic changes in biological samples.
    sulfo-Cy7.5 amine
  • HY-P4406A
    Abz-AGLA-Nba TFA
    		99.64%
    Abz-AGLA-Nba TFA is a fluorogenic substrate for the determination of protease activity. Abz-AGLA-Nba TFA is hydrolyzed to release aminoacyl benzimide (Abz-AGLA) and 2-naphthylaminoacyl (Nba). The product Abz-AGLA produced by this hydrolysis reaction is fluorescent under ultraviolet light and can emit a fluorescent signal.
    Abz-AGLA-Nba TFA
  • HY-D0058
    3,3'-Dipropylthiacarbocyanine iodide
    3,3'-Dipropylthiacarbocyanine (iodide) 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.
    3,3'-Dipropylthiacarbocyanine iodide
  • HY-W775174
    Citrus red 2
    		99.57%
    Citrus red 2 (CI Solvent red 80) is a synthetic dye with coloring power and antioxidant activity. Citrus red 2 can be used in food and cosmetics to provide a bright color to the product. Citrus red 2 is also used as a reference substance for testing and analysis in certain situations.
    Citrus red 2
  • HY-D1821
    Vari Fluor 750 Carboxylic acid（free acid）
    Vari Fluor 750 Carboxylic acid (VF 750 Carboxylic acid) free acid is a carboxylic acid derivative of Vari Fluor. Vari Fluor carboxylic acid derivatives are unactivated labeled fluorescent dyes for protein, antibody, and polysaccharide labeling that require carboxylic acid activation for use.
    Vari Fluor 750 Carboxylic acid（free acid）
  • HY-W748361
    Sulfo-Cy3(Me)COOH sodium
    Sulfo-Cy3(Me)COOH sodium is a derivative of Cy3 (Cyanine3) (HY-D0822) dye containing sulfonate ions. Trisulfo-Cy3-acid disodium contains sulfonate ions and has improved water solubility.
    Sulfo-Cy3(Me)COOH sodium
  • HY-D1158
    HKOCl-4m
    		98.27%
    HKOCl-4m is a selective and mitochondria-targeting rhodol-based fluorescent probe for monitoring mitochondrial hypochlorous acid (HOCl).
    HKOCl-4m
  • HY-D1195
    Vat Blue 2
    Vat Blue 2, a indigo (HY-N0335) derivative, is a dark blue 5,5'-dibromo-4,4'-dichloroindigo dye.
    Vat Blue 2
  • HY-149203A
    MQA-P TFA
    MQA-P is a multifunctional near-infrared (NIR) fluorescent probe that simultaneously detects ONOO-, viscosity, and polarity within mitochondria. MQA-P exhibits significant response to ONOO-, λem=645 nm; and NIR channel at λem>704 nm Medium is highly sensitive to viscosity/polarity. MQA-P possesses excited-state intramolecular charge transfer (ESICT) properties that are highly sensitive to polarity by designing the N,N-dimethylamino group as the electron donor and the quinoline cation unit as the electron acceptor. MQA-P is used for ferroptosis or cancer diagnosis in vitro and in vivo via dual-channel images.
    MQA-P TFA
  • HY-147104
    Fmoc-Lys(5-FITC)-OH
    Fmoc-Lys(5-FITC)-OH is a marker for polypeptides or proteins. FITC is a fluorescence probe for the labeling of amines. FITC is a pH- and Cu2+-sensitive fluorescence dye.
    Fmoc-Lys(5-FITC)-OH
  • HY-160279
    DSPE-PEG5000-Fluor 647
    DSPE-PEG5000-Fluor 647 is a fluorescent lipid (Ex/Em=648/671 nm) composed of PEG-lipid-dye conjugation. DSPE is a phospholipid. Fluor 647 is a fluorescent dye. DSPE-PEG5000-Fluor 647 can be used to prepare nanoparticles or liposomes with fluorescent signals.
    DSPE-PEG5000-Fluor 647
  • HY-D0167
    NHS-5(6)Carboxyrhodamine
    NHS-5(6)Carboxyrhodamine is a dye used for fluorescence labeling applications, where accurate dye/protein ratios can be obtained under native conditions.
    NHS-5(6)Carboxyrhodamine
  • HY-NP090
    Ulex Europaeus Agglutinin I
    Ulex Europaeus Agglutinin I (UEA I) is a plant lectin that can be used as a probe to specifically bind biomolecules (such as polysaccharides, peptides, etc.).Ulex Europaeus Agglutinin I (UEA I) is a biological material or organic compound that can be used in life science research.
    Ulex Europaeus Agglutinin I
  • HY-D1258
    AC-green
    		98.04%
    AC-green (VDP-green) is a β-allyl carbamate fluorescent probe for specifically imaging vicinal dithiol proteins (VDPs) in living systems (λex/λem=400/475 nm). AC-green can detect the reduced bovine serum albumin (rBSA) with high sensitivity. AC-green displays low toxicity and features high sensitivity, and is suitable for sensing VDPs in living cells and zebrafishes.
    AC-green
Cat. No. Product Name / Synonyms Application Reactivity