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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-126395
    Patent Blue V calcium salt
    		99.99%
    Patent Blue V calcium salt is a triarylmethane dye used for tissue staining and lymphatic tracing, mainly applied by topical injection or eye drops. Patent Blue V calcium salt has affinity for specific tissues (such as corneal endothelium, lymphatic system), and stains the target structure by adsorption or binding, assisting in precise operation during surgery. Patent Blue V calcium salt is mainly used in ophthalmic surgery (such as graft staining for Descemet's membrane endothelial keratoplasty) and lymphatic drainage localization for sentinel lymph node biopsy of tumors.
    Patent Blue V calcium salt
  • HY-W103047
    1-Pyrenebutyric acid
    1-Pyrenebutyric acid is a fluorescence probe whose fluorescence lifetime depends on local oxygen and free radical concentrations. 1-Pyrenebutyric acid is used in fluorescence determination of DNA. 1-Pyrenebutyric acid can be used as a linker for biomolecules to form a self-assembled monolayer on grapheme. 1-Pyrenebutyric acid can also be used for the measurement of free radicals in solution and in living cells.
    1-Pyrenebutyric acid
  • HY-W110927
    Alizarin Red S Indicator (4.3-6.3), IND
    Alizarin red S indicator (C.I. 58005) is a reductively active (quinone-based) anthraquinone dye that forms complexes with metal ions (such as zirconium, calcium) or boric acid to label calcium deposition and perform electrochemical sensing functions. Alizarin Red S undergoes reversible redox reactions (for electrochemical detection) and irreversible chelation (for bone staining). Alizarin Red S is mainly used in bone metabolism research (labeling mineralized tissue), sugar detection (boric acid-sugar competition system) and metal ion sensing (such as zirconium ion detection)， and can be used in osteoporosis and metabolic disease research.
    Alizarin Red S Indicator (4.3-6.3), IND
  • HY-D0853A
    DiAzKs hydrochloride
    		98.0%
    DiAzKs (H-L-Photo-lysine) hydrochloride is a diazirine-containing lysine amino acid and is a photo-cross-linker. DiAzKs hydrochloride can site-selective incorporated into proteins and is used to crosslink protein-protein interactions in vitro and in living cells. DiAzKs hydrochloride acts as a UV light-activated photo-crosslinking probe.
    DiAzKs hydrochloride
  • HY-D1818
    Vari Fluor 680-Phalloidin
    Vari Fluor 680-Phalloidin is a fluorescent derivative of Phalloidin that specifically labels myofilament proteins and exhibits red fluorescence when labeled at 680/700 nm.
    Vari Fluor 680-Phalloidin
  • HY-153231
    eGFP mRNA-LNP
    eGFP mRNA-LNP is a lipid nanoparticle (LNP) containing eGFP mRNA. eGFP mRNA-LNP carries Enhanced Green Fluorescent Protein (eGFP), which will express green fluorescent protein after entering the cell. eGFP is commonly used as a reporter gene detectable by fluorescence microscopy or flow cytometry (excitation wavelength = 488 nm; emission wavelength = 535/40 bandpass). eGFP mRNA-LNP can be used for RNA delivery, translation efficiency and cell viability.
    eGFP mRNA-LNP
  • HY-D1630
    4-Di-10-ASP
    		98.0%
    4-Di-10-ASP is a fluorescent lipophilic tracer (Excitation 485 nm; Emission 620 nm). 4-Di-10-ASP can be used to stain phospholipid membranes in a specific manner.
    4-Di-10-ASP
  • HY-D0918
    YO-PRO-1
    		98.20%
    YO-PRO-1 is a non-cell-membrane-penetrating green fluorescent dye. YO-PRO-1 cannot penetrate normal cell membranes but can penetrate the membranes of apoptotic and necrotic cells. YO-PRO-1 has a high affinity for DNA. When it is not bound to DNA, it emits almost no fluorescence, and when it binds to DNA, it can emit green fluorescence (Ex/Em: 488/530±30 nM). YO-PRO-1 is often used together with Propidium Iodide (HY-D0815) to analyze and identify apoptotic and necrotic cells.
    YO-PRO-1
  • HY-D1266
    RB-OPD
    RB-OPD (NO-red) is a o-phenylenediamine (OPD)-locked rhodamine nitric oxide (NO) fluorescent probe with great sensitivity and selectivity (λex=550 nm, λem=590 nm).
    RB-OPD
  • HY-P0286F1A
    FITC-OVA (323-339) TFA
    		98.14%
    FITC-OVA (323-339) TFA is a biological active peptide. (FITC labeled HY-P0286)
    FITC-OVA (323-339) TFA
  • HY-W010947
    4-Methylumbelliferyl palmitate
    		99.23%
    4-Methylumbelliferyl palmitate is an excellent fluorophore for measuring acid lipase in human leukocytes. Acidity and solvent have important influence on its fluorescence. 4-Methylumbelliferyl palmitate exists mainly as neutral molecular form which can be produced strong fluorescence at 445 nm in near neutral aqueous solutions, and exist mainly as anion form which can be produced stronger fluorescence at 445 nm in weak alkaline solutions.
    4-Methylumbelliferyl palmitate
  • HY-D0933
    Auramine O
    Auramine O is a yellow fluorescent dye. Auramine O is used to detect amyloid fibrils. Auramine O promotes lung malignancy. Auramine O is also used to determine algal cell viability and stain acid-fast bacteria.
    Auramine O
  • HY-D0220A
    Toluidine Blue (purity 36%)
    Toluidine Blue (Toluidine Blue O) purity 36% is an alkaline quinonimine dye (vivo dye) with high affinity for acidic tissue components, staining nuclei blue and polysaccharides purple. Toluidine Blue purity 36% shows heterostaining properties for mast cells, mucins and chondrocytes. Toluidine Blue purity 36% can stain different components of plant tissues and cells in different colours. Toluidine Blue purity 36% is also used as a diagnostic aid to identify malignant lesions, such as cancer.
    Toluidine Blue (purity 36%)
  • HY-147309
    16-Azidohexadecanoic acid
    		≥98.0%
    16-Azidohexadecanoic acid, a synthetic fatty acid, can be used as a modification marker for nucleotides and a molecular probe for fatty acid metabolism. 16-Azidohexadecanoic acid 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.
    16-Azidohexadecanoic acid
  • HY-D1156A
    HKSOX-1m (5/6-mixture) hydrobromide
    		99.55%
    HKSOX-1m (5/6-mixture) hydrobromide is a O2 fluorescent probe for mitochondria-targeting (Ex/Em=509/534nm; green), exhibiting excellent selectivity and sensitivity toward O2 over a broad range of pH, strong oxidants, and abundant reductants found in cells.
    HKSOX-1m (5/6-mixture) hydrobromide
  • HY-N0324F
    Cholic acid-Biotin
    Cholic acid-Biotin is a biotin-labeled Cholic acid (HY-N0324). Cholic acid is a major primary bile acid produced in the liver and usually conjugated with glycine or taurine. It facilitates fat absorption and cholesterol excretion. Cholic acid has orally activity.
    Cholic acid-Biotin
  • HY-125750
    Coumarin 7
    		99.80%
    Coumarin 7 is a coumarin laser dye in plants in the form of glycosides.
    Coumarin 7
  • HY-151711
    Sulfo-Cy5.5 Azide
    Sulfo-Cy5.5 Azide is a click chemistry reagent containing an azide group. Sulfo-Cy5.5 Azide is also a water-soluble dye (Ex=673 nm, Em=707 nm), which designed to label sensitive molecules such as peptides, proteins and oligonucleotides. It contains an azide group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing alkyne groups. It can also undergo ring strain-promoted alkyne-azide cycloaddition (SPAAC) with molecules containing DBCO or BCN groups.
    Sulfo-Cy5.5 Azide
  • HY-131021
    Janelia Fluor® 549, Azide
    Janelia Fluor? 549, Azide (JF549, Azide) is a fluorescent dye with the absorption maximum (λab (max)) of 549 nm and emission maximum (λem (max)) of 571 nm. Janelia Fluor? products are licensed under U.S. Pat. Nos. 9,933,417, 10,018,624 and 10,161,932 and other patents from Howard Hughes Medical Institute. It contains an azide group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing alkyne groups. It can also undergo ring strain-promoted alkyne-azide cycloaddition (SPAAC) with molecules containing DBCO or BCN groups.
    Janelia Fluor® 549, Azide
  • HY-D0075
    DHPDS disodium salt
    		98.01%
    DHPDS disodium salt is a pH-sensitive fluorescent dye. DHPDS disodium salt is used to measure intracellular pH (pHi) from the surface fluorescence of the isolated perfused rat liver.
    DHPDS disodium salt
Cat. No. Product Name / Synonyms Application Reactivity