IR 650 Alkyne

Unit Size
Price (USD)
Cat.#: 1505-1
Unit size: 1 mg
in stock
Cat.#: 1505-5
Unit size: 5 mg
in stock
Cat.#: 1505-25
Unit size: 25 mg
in stock
Cat.#: 1505-100
Unit size: 100 mg
in stock

IR 650 Alkyne (IRDye® 650 Alkyne analog) is a water-soluble, bright, far-red fluorescent probe with excitation ideally suited for the 633 nm or 647 nm laser lines. A significant advantage to using long wavelength dyes such as Cy5® Dye or Alexa Fluor® 647 dye over other fluorophores is the low autofluorescence of biological specimens in this region of the spectrum.

IR 650 Alkyne is a bright, far-red-fluorescent, pH insensitive alkyne-activated probe routinely used for imaging of azide-containing biomolecules. IR 650 Alkyne reacts with azides via a copper-catalyzed click reaction (CuAAC) to form a stable triazole linker. A probe for copper-less detection (IR 650 DBCO) is also available for application where the presence of copper is not acceptable.

Azide, picolyl azide
Abs/Em Maxima
651/668 nm
Extinction coefficient
230,000 cm-1M-1
Water, DMSO, DMF
Spectrally similar dyes
Cy5, Alexa Fluor® 647, DyLight® 649,
Molecular weight
Storage conditions
Shipping conditions
Ambient temperature

IRDye® is a trademark of LI-COR Biotechnology.