TODi-3, far-red fluorescent nucleic acid stain

Cat. # Quantity Price Lead time
A2610 50 uL, 5 mM/DMSO $85 in stock
22610 200 uL, 5 mM/DMSO $320 in stock
Found better price? Let us know and we will propose the way forward!

TODi-3 (Thiazole Red Homodimer, also known as TOTO®-3) is a far-red fluorescent carbocyanine dimeric dye. TODi-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.

The bright fluorescence signal and low background make TODi-3 ideal for staining nucleic acids on microarrays, as well as for nuclear and chromosome counterstaining in multicolor fluorescence labeling experiments. TODi-3 is non-cytotoxic and may be used for long-term 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 TODi-3 (DNA–dye complex)

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

Customers also purchased with this product

Cyanine3B amine

Amino derivative of Cyanine3B, a reactive dye with significantly increased fluorescence quantum yield and photostability for the conjugation with activated esters and epoxides.

AF 488 azide

AF 488 azide is a fluorophore with emission in the green spectrum range. It reacts with alkynes in copper-catalyzed cycloaddition reactions.

Cyanine5 amine

Cyanine5 amine functionalized dye for the coupling with activated esters and epoxides.
Add this product to your cart and
get free express delivery

General properties

Appearance: blue solution
Molecular weight: 1354.87
CAS number: 166196-17-4
Molecular formula: C53H62I4N6S2
IUPAC name: Quinolinium, 1,1′-[1,3-propanediylbis[(dimethyliminio)-3,1-propanediyl]]bis[4-[3-(3-methyl-2(3H)-benzothiazolylidene)-1-propenyl]-, tetraiodide
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: 644
Emission maximum, nm: 662
Your item has been added. View your cart or proceed to checkout
The count of items is incorrect.