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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-D0378
    Acid Green 9
    Acid Green 9 is a green dye that can be decolorized by ultrasonic irradiation.
    Acid Green 9
  • HY-D2561
    Cy5.5-PEG-N3 (MW 3400)
    Cy5.5-PEG-N3 (MW 3400) is a Cy5.5 (HY-D0924)-azide fluorescent dye used to label for protein and nucleic acid. Cy5.5-PEG-N3 (MW 3400) 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.
    Cy5.5-PEG-N3 (MW 3400)
  • HY-D1307A
    Sulfo-cyanine7 alkyne potassium
    Sulfo-cyanine7 alkyne potassium is a water-soluble near-infrared dye with a sulfonated terminal alkyne that can be used in copper-catalyzed click chemistry reactions to conjugate with azides in an aqueous environment.
    Sulfo-cyanine7 alkyne potassium
  • HY-D2589
    Cy7.5 PEG-SH
    Cy7.5 PEG-SH is a fluorescent labeling reagent that combines CY7.5 (HY-D0926) fluorescent dye, polyethylene glycol (PEG) and sulfhydryl (SH) derivatives, and is suitable for molecular coupling. SH is highly reactive and can react with a variety of functional groups (such as maleimide) to form stable thioether bonds (Ex/Em = 770/820 nm).
    Cy7.5 PEG-SH
  • HY-D2425
    Disperse Red 153
    Disperse Red 153 is an azo dye that can be used in plastics, textiles, and cosmetics.
    Disperse Red 153
  • HY-D2699
    Cy7.5 HA MA (MW 10000)
    Cy7.5 HA MA (MW 10000) is a hyaluronic acid methacrylate labeled with CY7.5 (HY-D0926). Cy7.5 HA MA (MW 10000) is widely used in the fields of biolabeling and imaging, drug delivery and tissue engineering and regenerative medicine (Ex/Em = 770/820 nm).
    Cy7.5 HA MA (MW 10000)
  • HY-D0365
    Pigment Yellow 147
    Pigment Yellow 147 is a disazomethine dye with solid-state fluorescence.a biologically active chemical.
    Pigment Yellow 147
  • HY-D2845C
    4-arm-PEG-FITC (MW 20000)
    4-arm-PEG-FITC (MW 20000) is a fluorescent dye composed of FITC (HY-66019) and four-arm polyethylene glycol (4-Arm PEG). 4-arm-PEG-FITC (MW 20000) can be used to modify proteins, peptides and other materials with active groups (Ex/Em = 488/525 nm).
    4-arm-PEG-FITC (MW 20000)
  • HY-D0435
    C.I. Acid brown 120
    C.I. Acid brown 120 is an acidic brown dye that can be adsorbed and removed by bentone clay.
    C.I. Acid brown 120
  • HY-118907R
    Methyl Orange (Standard)
    Methyl Orange (Standard) is the analytical standard of Methyl Orange. This product is intended for research and analytical applications. Methyl Orange is a soluble azo dye commonly used as an acid-base indicator and for staining cells and tissue sections, as well as for dyeing textiles. Methyl Orange appears red at a pH of 3.1 and changes to bright yellow as the pH increases to 4.4. Methyl Orange (500 mg/L) exhibits cytotoxicity and can cause DNA damage.
    Methyl Orange (Standard)
  • HY-160274
    DSPE-PEG-Fluor 555,MW 2000
    DSPE-PEG-Fluor 555,MW 2000 is a PEG lipid conjugate with a DSPE group and a Fluor 555 dye. DSPE is a phosphoethanolamine (PE) lipid that can be used in the synthesis of liposomes. And Fluor 555 is a fluorescent dye.
    DSPE-PEG-Fluor 555,MW 2000
  • HY-D2505
    Cy3-PEG-NH2 (MW 1000)
    Cy3-PEG-NH2 (MW 1000) is a polyethylene glycol derivative containing Cy3 (HY-D0822) fluorescent dye and polyethylene glycol (PEG) and an amino group. The Cy3 fluorophore is commonly used in applications such as immunolabeling, nucleic acid labeling, fluorescence microscopy, and flow cytometry. Cy3 has an emission maximum around 562-570 nm. Cy3-PEG-NH2 (MW 1000) can be used for fluorescence imaging, fluorescence tracing and fluorescence labeling.
    Cy3-PEG-NH2 (MW 1000)
  • HY-D0422
    C.I. Acid red 183
    C.I. Acid red 183 is an acid red dye that can be adsorbed and removed by bentone clay.
    C.I. Acid red 183
  • HY-168377
    Fluo-4 potassium
    Fluo-4 potassium is a cell-permeable Ca2+ (calcium ion) indicator (λex=494 nm, λem=516 nm).
    Fluo-4 potassium
  • HY-D1292C
    Photoacoustic contrast agent-2 acetate
    Photoacoustic contrast agent-2 (acetate) 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.
    Photoacoustic contrast agent-2 acetate
  • HY-D2771
    BP Fluor 405 NHS ester
    BP Fluor 405 NHS Ester is a water-soluble, blue-fluorescent dye that is often used in multi-color applications, including flow cytometry and super-resolution microscopy using STORM. Its excitation is ideally suited for the 407 nm spectral line of the krypton laser or the 408 nm violet laser diode. BP Fluor 405 conjugates are pH-insensitive from pH 4 to pH 10. The NHS ester (or succinimidyl ester) is the most popular amine reactive group for labeling with the primary amines of proteins (Lys), amine-modified oligonucleotides, and other amine-containing molecules. Proteins can be labeled with BP Fluor 405 NHS Ester at high molar ratios without significant self-quenching, leading to brighter conjugates and more sensitive detection. BP Fluor 405 conjugates can also be used for the detection of abundance targets.
    BP Fluor 405 NHS ester
  • HY-D1524A
    N-(Aminoethyl)-8-naphthylamine-1-sulfonic acid sodium
    N-(Aminoethyl)-8-naphthylamine-1-sulfonic acid sodium (1,8-EDNAS sodium) 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.
    N-(Aminoethyl)-8-naphthylamine-1-sulfonic acid sodium
  • HY-160869
    Firefly luciferase-IN-2
    Firefly luciferase-IN-2 (compound 5j) is an inhibitor of ATP-dependent luciferase (Firefly luciferase), the major light-emitting enzyme in fireflies and kowtow bugs. Firefly luciferase-IN-2 inhibits P. pyralis luciferase with an IC50 of 0.15 μM, while the inhibitory potency against R. reniformis is not significant.
    Firefly luciferase-IN-2
  • HY-D0360
    Mordant Blue 9
    Mordant Blue 9 is an azo dye commonly used for dyeing textiles.
    Mordant Blue 9
  • HY-D0383
    Pigment Red 146
    Pigment Red 146 is a commonly used commercial dye for bulk coloring of plastics and synthetic fibers and for surface coatings such as paints and inks.
    Pigment Red 146
Cat. No. Product Name / Synonyms Application Reactivity