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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-D2798
    FITC-PEG-SH (MW 400)
    FITC-PEG-SH (MW 400) is a fluorescent dye composed of polyethylene glycol (PEG), FITC (HY-66019) and a sulfhydryl (SH). FITC-PEG-SH (MW 400) can be used for fluorescent labeling and imaging.
    FITC-PEG-SH (MW 400)
  • HY-N15351
    Flavokermesic acid
    Flavokermesic acid is an anthraquinone dye found in extracts of insects from the Kermesidae family, where it occurs as a minor pigment component. Flavokermesic acid can be used to study the biosynthetic pathways of insect-derived anthraquinone pigments.
    Flavokermesic acid
  • HY-D2222
    5-HMSiR-Hochest
    5-HMSiR-Hoechst is a DNA probe. 5-HMSiR-Hoechst comprises Hoechst 33258 and spontaneously blinking far-red hydroxymethyl silicon-rhodamine (HMSiR). 5-HMSiR-Hoechst can stain living cells. Ex/Em=640 nm/675 nm.
    5-HMSiR-Hochest
  • HY-D0394
    C.I. Pigment red 2
    C.I. Pigment red 2 is the most important colorant used to add color or change the color of something and is chemically essentially unaffected by the carrier or medium into which it is incorporated. It can be widely used in textile, medicine, food, cosmetics, plastics, paint, ink, photography and paper industries.
    C.I. Pigment red 2
  • HY-W800693
    BP Fluor 405 picolyl azide
    BP Fluor 405 Picolyl Azide is an advanced fluorescent probe that incorporatess a copper-chelating motif to raise the effective concentration of Cu(I) at the reaction site. The rate of the CuAAC reaction depends on the concentrations of all reagents, including copper, therefore raising the effective copper concentration at the reaction site dramatically increases the rate of CuAAC reaction without increasing the concentrations of azide reagent or copper. In addition, the use of picolyl azide instead of conventional azides allows for at least a tenfold reduction in the concentration of the copper catalyst without sacrificing the efficiency of labeling. In summary, the introduction of a picolyl moiety into an azide probe leads to a substantial increase in the sensitivity of alkyne detection. This is of special value for the detection of low abundance targets or where significant increase in signal intensity is desired.
    BP Fluor 405 picolyl azide
  • HY-D2512
    Cy3-PEG-SH (MW 5000)
    Cy3-PEG-SH (MW 5000) is a fluorescent labeling reagent that combines Cy3 (HY-D0822) 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.
    Cy3-PEG-SH (MW 5000)
  • HY-172398
    FAM phosphoramidite, 5-isomer
    FAM phosphoramidite, 5-isomer is a standard fluorescein (FAM) phosphoramidite for 5'-terminal oligonucleotide labeling, high isomeric purity single isomer.
    FAM phosphoramidite, 5-isomer
  • HY-D0444
    C.I. Acid brown 121
    C.I. Acid brown 121 is an acidic brown dye that can be adsorbed and removed by bentone clay.
    C.I. Acid brown 121
  • HY-D2518
    Cy3-PEG-DSPE (MW 10000)
    Cy3-PEG-DSPE (MW 10000) is a compound for the labeling and visualization of nanoparticles or other materials. Cy3-PEG-DSPE (MW 10000) has a variety of applications including drug delivery, cellular imaging, tracing of bioprocesses, and the study of interactions at the molecular level.
    Cy3-PEG-DSPE (MW 10000)
  • HY-D2545
    Cy5-PEG-DSPE (MW 10000)
    Cy5-PEG-DSPE (MW 10000) is a PEG phospholipid with Cy5 (HY-D0821) dye used in protein/nucelic acid labeling and fluorescence microscopy. Cy5-PEG-DSPE (MW 10000) can self-assemble in aqueous solution to form micelles/lipid bilayer and used to prepare liposomes or nanoparticles for nutrients delivery such as mRNA or DNA vaccine.
    Cy5-PEG-DSPE (MW 10000)
  • HY-D2842C
    FITC-PEG-biotin (MW 3400)
    FITC-PEG-biotin (MW 3400) is a fluorescent dye composed of polyethylene glycol (PEG), FITC (HY-66019) and a Biotin (HY-B0511). FITC-PEG-biotin (MW 3400) can be used for fluorescent labeling and imaging.
    FITC-PEG-biotin (MW 3400)
  • HY-D2535
    Cy5-PEG-N3 (MW 5000)
    Cy5-PEG-N3 (MW 5000) is a Cy5 (HY-D0821)-azide fluorescent dye used to label for protein and nucleic acid. Cy5-PEG-N3 (MW 5000) 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-PEG-N3 (MW 5000)
  • HY-D2802
    FITC-PEG-N3 (MW 400)
    FITC-PEG-N3 (MW 400) is an azide fluorescent dye containing polyethylene glycol (PEG) and FITC (HY-66019). FITC-PEG-N3 (MW 400) 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.
    FITC-PEG-N3 (MW 400)
  • HY-D0354
    Mordant Orange 6
    Mordant Orange 6 is a mordant acid dye commonly used for dyeing wool fibers and other textiles.
    Mordant Orange 6
  • HY-D0470
    Acid orange 74
    Acid orange 74 is an azo dye.
    Acid orange 74
  • HY-D2795B
    FITC-PEG-COOH (MW 5000)
    FITC-PEG-COOH (MW 5000) is a fluorescent dye composed of polyethylene glycol (PEG), FITC (HY-66019) and a COOH. FITC-PEG-COOH (MW 5000) can be used for fluorescent labeling and imaging.
    FITC-PEG-COOH (MW 5000)
  • HY-D2739
    SIMA phosphoramidite, 6-isomer
    SIMA phosphoramidite, 6-isomer is a xanthene dye with spectral characteristics similar to those of HEX but with a higher quantum yield. SIMA has higher stability during deprotection under alkaline conditions.
    SIMA phosphoramidite, 6-isomer
  • HY-D0519
    C.I. Pigment red 52:1
    C.I. Pigment red 52:1 is the most important colorant used to add color or change the color of something and is chemically essentially unaffected by the carrier or medium into which it is incorporated. It can be widely used in textile, medicine, food, cosmetics, plastics, paint, ink, photography and paper industries.
    C.I. Pigment red 52:1
  • HY-D0321
    Disperse Blue 183
    Disperse Blue 183 is a blue dye commonly used for fiber dyeing.
    Disperse Blue 183
  • HY-D2224
    Sulfo-Cy5.5 dUTP
    Sulfo-Cy5.5 dUTP is a dUTP far-infrared fluorescent dye containing sulfonated Cyanine5.5 group.
    Sulfo-Cy5.5 dUTP
Cat. No. Product Name / Synonyms Application Reactivity