TO-TAP-1, green fluorescent nucleic acid stain
Cat. # | Quantity | Price | Lead time | Buy this product |
---|---|---|---|---|
A3610 | 50 uL, 5 mM/DMSO |
$85
|
in stock | |
23610 | 200 uL, 5 mM/DMSO |
$320
|
in stock |
TO-TAP-1 (Thiazole Orange Monomer, also known as TO-PRO®-1) is a green fluorescent carbocyanine monomeric dye. TO-TAP-1 is a cell-impermeant nucleic acid stain that is nonfluorescent in the absence of nucleic acids but exhibits a multiple fluorescence enhancement upon binding to dsDNA.
The bright fluorescence signal and low background make TO-TAP-1 ideal for staining nucleic acids on microarrays, as well as for nuclear and chromosome counterstaining in multicolor fluorescence labeling experiments. TO-TAP-1 is non-cytotoxic and may be used for long-term monitoring of cell viability and dead cell detection in culture.
Absorption and emission spectra of TO-TAP-1 (DNA–dye complex)

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Appearance: | orange solution |
Molecular weight: | 645.39 |
CAS number: | 157199-59-2 |
Molecular formula: | C24H29I2N3S |
IUPAC name: | Quinolinium, 4-[(3-methyl-2(3H)-benzothiazolylidene)methyl]-1-[3-(trimethylammonio)propyl]-, 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: | 513 |
Emission maximum, nm: | 533 |
