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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-D1119C
    AF647-NHS ester triTEA
    		99.74%
    AF647-NHS ester is an analogue of Alexa Fluor 647 (AF647), which has excitation wavelength (λex) of 635 nm (conventional fluorescence detection)/620 nm (instantaneous detection).
    AF647-NHS ester triTEA
  • HY-D1817
    Vari Fluor 488-Phalloidin
    Vari Fluor 488-Phalloidin is a fluorescent derivative of Phalloidin that specifically labels myofilament proteins and exhibits green fluorescence when labeled, allowing for fluorescence imaging using FITC channels (Ex/Em=488 nm/513 nm).
    Vari Fluor 488-Phalloidin
  • HY-15937
    5(6)-FAM SE
    5(6)-FAM SE is a green fluorescent dye widely used for protein labeling.
    5(6)-FAM SE
  • HY-D0722
    5(6)-CFDA
    		99.31%
    5(6)-CFDA is a common aliphatic luciferin-line organism. CFDA conducts free diffusion into cells, and then it is hydrolyzed into carboxyl fluorescein (CF) by intracellular non-specific lipase. CF containing portion contains an additional negative charge so that it is better retained in cells, compared to fluorescein dyes.
    5(6)-CFDA
  • HY-103469
    Peroxy Orange 1
    		99.20%
    Peroxy Orange 1 (PO1) is a new H2O2 specific probe that can bind to green fluorescent highly reactive oxygen species (hROS) probe APF. Peroxy Orange 1 is also a living cell dye.
    Peroxy Orange 1
  • HY-19204
    Zinc phthalocyanine
    		98.0%
    Zinc phthalocyanine (ZnPc) is commonly applied in industry (catalysts, photoconductors) and biomedical (photodynamic therapy, PDT). Zinc phthalocyanine can be used to photooxidise cyclohexane and is promising for research of solar-cell applications.
    Zinc phthalocyanine
  • HY-15941
    5(6)-FITC
    5(6)-FITC (Fluorescein 5(6)-isothiocyanate) is an amine-reactive derivative of a fluorescent dye, characterized by high absorbance and excellent fluorescence quantum yield. The isothiocyanate group of FITC can react with various functional groups on proteins, including amines, thiols, imidazoles, tyrosines and carbonyls, enabling the labeling of proteins such as antibodies and lectins. 5(6)-FITC has a wide range of applications, including flow cytometry, immunofluorescence, protease assays and conjugation. The maximum excitation/emission wavelengths are 492/518 nm.
    5(6)-FITC
  • HY-101888
    Cresyl Violet acetate
    Cresyl Violet acetate is a dye, which can be used to stain neurons.
    Cresyl Violet acetate
  • HY-P2528
    Enhanced Green Fluorescent Protein (EGFP) (200-208)
    		98.97%
    Enhanced Green Fluorescent Protein (EGFP) (200-208) is a marker gene product derived from the jellyfish Aequorea Victoria. Enhanced Green Fluorescent Protein (EGFP) (200-208) is a common reporter protein and is easy to detect.
    Enhanced Green Fluorescent Protein (EGFP) (200-208)
  • HY-D1563
    CypHer 5
    		98.40%
    CypHer 5 is a pH-sensitive cyanine derivative and a environmental sensitive fluorophore. CypHer 5 has a pH-sensitive maximal absorption at 644 nm and emission at 664 nm. CypHer 5 has been used as a pH sensor of lysosomal compartments.
    CypHer 5
  • HY-B1571
    Bromophenol blue
    Bromophenol blue is an acid phthalein dye, and it is used as a tracking dye for electrophoresis. Bromophenol blue is also used as a pH indicator, with a transition range of pH 3 to 4.6. Bromophenol blue is used as a sensor for the determination of several compounds including ammonia, drugs, proteins and amino acids. The binding of Bromophenol blue to proteins is accompanied by the appearance of a strong absorbance at 610 nm.
    Bromophenol blue
  • HY-D2171A
    AF488 DBCO ditriethylamine
    AF488 DBCO ditriethylamine is the ditriethylamine salt form of AF488 DBCO (HY-D2171). AF488 DBCO ditriethylamine is a fluorescent dye that labels azide-containing biomolecules. DBCO is the bioorthogonal partner of azide that allows covalent coupling in the absence of copper. AF488 is a bright, photostable green fluorophore. AF488 exhibits the λem and λex wavelength of 520 nm and 470 nm, respectively.
    AF488 DBCO ditriethylamine
  • HY-P0019
    Z-Gly-Gly-Arg-AMC
    		99.90%
    Z-Gly-Gly-Arg-AMC is a thrombin-specific fluorogenic substrate for testing of thrombin generation in PRP and platelet-poor plasma (PPP) (Ex/Em = 390/480 nm).
    Z-Gly-Gly-Arg-AMC
  • HY-D1389
    Sulfo-CY-5.5 NHS ester tripotassium
    Sulfo-CY-5.5 NHS ester (Sulfo-Cyanine5.5 NHS ester) tripotassium is an amine-reactive ester of sulfonated far-red Cyanine5.5 fluorophore, which can be used to label antibodies, proteins, etc., as well as for in vivo NIR imaging.
    Sulfo-CY-5.5 NHS ester tripotassium
  • HY-W127715
    Lucifer Yellow CH dipotassium salt
    		99.87%
    Lucifer Yellow CH dipotassium is a high-intensity fluorescent probe containing free hydrazyl groups. Lucifer Yellow CH can react with fatty aldehydes at room temperature. Lucifer Yellow CH serves as a biological tracer to monitor neuronal branching, regeneration, gap junction detection and characterization, and selective ablation of cells after aldehyde fixation. Lucifer yellow CH displays the maximum excitation/emission of 430 nm/540 nm, respectively.
    Lucifer Yellow CH dipotassium salt
  • HY-108166A
    Hydroxystilbamidine bis(methanesulfonate)
    		98.27%
    Hydroxystilbamidine bis(methanesulfonate) is a dye that can bind to DNA and RNA; it's a fluorescent cationic dye, often used as a retrograde neuronal tracer and has also been found to be a potent inhibitor of cellular ribonucleases.
    Hydroxystilbamidine bis(methanesulfonate)
  • HY-111263
    NIAD-4
    		99.11%
    NIAD-4 is a fluorophore for optical imaging of amyloid-β (Aβ) in the central nervous system (CNS) for Alzheimer’s disease (AD). NIAD-4 binds to the same Aβ site with the binding affinity (Ki) of 10 nM.
    NIAD-4
  • HY-D1834
    Vari Fluor 640 TSA（200×）
    Vari Fluor 640 TSA（200×） (VF 640 Tyramide) is a fluorescent probe belonging to the Vari Fluor TSA series. Vari Fluor TSA series fluorescent probes can be used for high-density in situ labeling of target antigens using horseradish peroxidase (HRP) assays, which are widely used in ELISA, IF, IHC and other techniques with high detection sensitivity.
    Vari Fluor 640 TSA（200×）
  • HY-138159
    Boc-Lys(Ac)-AMC
    		99.53%
    Boc-Lys(Ac)-AMC is a cell-permeable fluorometric HDAC substrate (Ex/Em = 355 nm/460 nm).
    Boc-Lys(Ac)-AMC
  • HY-D1506
    Fl-DIBO
    		99.28%
    Fl-DIBO (fluorogenic dibenzocyclooctyne) is a selective and high sensitivity fluorescent probe to azide compounds. Fl-DIBO can react rapidly with azide compounds to form new highly fluorescent products with a maximum emission wavelength of 469 nm and excitation wavelength of 363 nm. Fl-DIBO can be used to label diazo-tagged proteins without detectable background signal interference. Fl-DIBO is a click chemistry reagent, it contains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.
    Fl-DIBO
Cat. No. Product Name / Synonyms Application Reactivity