Fluorescent Probes and Dyes

Chemical dyes have been shown to be effective fluorescence tools in studying proteins, nucleic acids, lipid, carbohydrates, viruses, bacteria, cells, tissues, lymphokines, GPCRs, hormones and drugs.

  • Cyanine probes can impart prominent fluorescence for detection and characterization of the study subjects. The sulfo cyanine series offer the benefit of being water-soluble with enhanced photostability and improved quantum yields. We also offer cyanine probes having reactive groups for direct bio-conjugations.
  • Fluorescein and Rhodamine dyes are widely used classic fluorescence tools. Fluorescein sodium salt, for example, has exhibited clinical indications in retinal demarcation. We also offer products having reactive groups for direct bio-conjugations.
  • Azo and Triphenylmethane dyes exhibit a plethora of applications ranging from pH indication, metal ions complexation and textile pigmentation, and they also play active roles in biological and histological staining studies.

  • Cyanine Fluorescent Probes
  • Fluorescein & Rhodamine Dyes
  • Classic Azo and Triphenylmethane-type Dyes
  • Structure Details
    Product Name: Orange G (>80 percent of dye content)
    Order number: 50P588931
    CAS: 1936-15-8
    Purity: >=80%
    Appearance: solid
    MF: C16H10N2NaO7S2-
    MW: 429.373
    MP: 141 oC

    The Orange G as a water-soluble azo dye product is a component in the OG-6 Papanicolaou regiment to stain keratin. Beside its histological application, it can be used with other yellow dyes to stain erythrocytes in trichrome methods. It is used for demonstrating cells in the pancreas and pituitary.
    Product Name: 4-(4-Nitrophenylazo)-1-naphthol
    Order number: 50P593866
    CAS: 5290-62-0
    Purity: >=95%
    Appearance: solid
    MF: C16H11N3O3
    MW: 293.282
    MP: 277-280 oC

    This azo dye product is a pH indicator. The color turns from red-orange to yellow when the pH is decreased. It is used as a fluorescent label for enzymes. It is also used for determination of Mg.
    Product Name: Basic Brown 1
    Order number: 50P594040
    CAS: 10114-58-6
    Purity: >=95%
    Appearance: solid
    MF: C18H18N8
    MW: 346.398
    MP: n.a. oC

    This diazo dye product stains acid mucins yellow. It is also a component of Papanicolaou's solutions, used for cervical, and other smears.
    Product Name: Phenol Red
    Order number: 50P600238
    CAS: 143-74-8
    Purity: >=95%
    Appearance: solid
    MF: C19H14O5S
    MW: 354.376
    MP: >300 oC

    The Phenol Red product as a triphenylmethane-type dye product responds to pH changes from neutral (red) to acidic (yellow) values in culture media. It is used to check the kidney function based on the excreted phenol red by colorimetric method. It is used as a non-absorbed marker in gravimetric method. As a pH indicator its applications are ranged from cell biology to household swimming pools.
    Product Name: Sudan I
    Order number: 50P608534
    CAS: 842-07-9
    Purity: >=95%
    Appearance: solid
    MF: C16H12N2O
    MW: 248.285
    MP: 131-133 oC

    This azo dye product is used to color waxes, oils and other non-aqueous liquids. It has been used to produce colored smoke. Sudan dyes are a group of lipid soluble solvent dyes often called lysochromes. By using proper solvents, Sudan I may also be used to stain some protein bound lipids in paraffin sections.
    Product Name: 6-FITC (3',6'-Dihydroxy-6-isothiocyanatospiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one)
    Order number: 204576
    CAS: 3326-31-6
    Purity: >=95%
    Appearance: solid
    MF: C21H11NO5S
    MW: 389.381
    MP: n.a. oC

    This fluorescein dye has been used conjugation with antibodies including the flow cytometry. With the isocyanate reactive group, the dye is capable of conjugating with peptides and proteins having cysteine residue (containing sulfhydryl SH) and lysine residue (containing terminal amine NH2). Addition of SH to isothiocyanate is faster to form dithiocarbamate which is converted to more stable thiour