TO-TAP-3, far-red fluorescent nucleic acid stain

Cat. # Quantity Price Lead time
A4610 50 uL, 5 mM/DMSO $85 in stock
24610 200 uL, 5 mM/DMSO $320 in stock
Found better price? Let us know and we will propose the way forward!

TO-TAP-3 (Thiazole Red Monomer, also known as TO-PRO®-3) is a far-red fluorescent carbocyanine monomeric dye. TO-TAP-3 is a cell-impermeant nucleic acid stain that is nonfluorescent in the absence of nucleic acids but exhibits a significant fluorescence enhancement upon binding to dsDNA.

TO-TAP-3 has a bright fluorescence signal and low background. The dye is useful for staining nucleic acids on microarrays, as well as for nuclear and chromosome counterstaining in microscopy. It may be used for monitoring of cell viability and dead cell detection in culture. The long-wavelength fluorescence of TO-TAP-3 is well separated from green and red fluorophores, which makes it ideal for multicolor fluorescence labeling experiments.

Absorption and emission spectra of TO-TAP-3 (DNA–dye complex)

Absorption and emission spectra of TO-TAP-3 (DNA–dye complex)

Customers also purchased with this product

LumiTracker® Mito Rhodamine 123

Rhodamine 123 is a cell-permeant, green-fluorescent dye that stains mitochondria in living cells in a membrane potential-dependent manner.

YODi-3, red fluorescent nucleic acid stain

YODi-3 is a cell-impermeant red fluorescent nucleic acid stain. YODi-3 is chemically equivalent to YOYO®-3.

DAPI, blue fluorescent nucleic acid stain

DAPI (4′,6-diamidino-2-phenylindole) is a blue-emitting fluorescent DNA dye used for chromosome staining and as a nuclear counterstain in fluorescence microscopy and flow cytometry.

General properties

Appearance: blue solution
Molecular weight: 671.43
CAS number: 157199-63-8
Molecular formula: C26H31I2N3S
IUPAC name: trimethyl-[3-[4-[(E,3Z)-3-(3-methyl-1,3-benzothiazol-2-ylidene)prop-1-enyl]quinolin-1-ium-1-yl]propyl]azanium;diiodide
Quality control: NMR 1H and HPLC-MS (95+%)
Storage conditions: 24 months after receival at -20°C in the dark. Transportation: at room temperature for up to 3 weeks. Desiccate.
MSDS: Download
Product specifications

Spectral properties

Excitation/absorption maximum, nm: 643 (complex)
Emission maximum, nm: 658 (complex)
Your item has been added. View your cart or proceed to checkout
The count of items is incorrect.