IRDye Infrared Fluorescent Dyes Deliver Enhanced Sensitivity.

IRDye® Infrared Dyes

IRDye infrared fluorescent dyes and near-infrared (NIR) fluorescence imaging deliver enhanced sensitivity due to low background autofluorescence in the near-infrared region and, therefore, higher signal-to-noise ratios.

IRDye fluorescent dyes have absorption and emission wavelengths in the NIR spectrum, between 680 and 800 nm. Most of the IRDye reagents are compatible with the Odyssey® CLx, Odyssey Fc, Odyssey Sa, Pearl® Imagers, and 4300 DNA Analyzer platforms.

Table 1. IRDye Properties and Forms Available

Dye Exmax (nm)* Emmax (nm)* NHS ester Maleimide Carboxylate DBCO Azide Alkyne Phosphoramidite Forms LI-COR channel
IRDye 800CW 778 794 check-box@2x check-box@2x check-box@2x check-box@2x check-box@2x check-box@2x NHS Ester, Maleimide, Carboxylate, DBCO, Azide, Alkyne 800 nm
IRDye 800RS 770 786 check-box@2x custom custom custom custom custom NHS Ester, custom 800 nm
IRDye 800 phosphoramidite 787 812 custom custom custom check-box@2x DBCO, Azide, Alkyne, Phosphoramidite 800 nm
IRDye 750 766 776 check-box@2x check-box@2x custom custom custom custom NHS Ester, Maleimide, custom
IRDye 700DX 680 687 check-box@2x custom custom custom custom custom NHS Ester, custom 700 nm
IRDye 700 phosphoramidite 680 697 check-box@2x DBCO, Azide, Alkyne, Phosphoramidite 700 nm
IRDye 680LT 680 694 check-box@2x check-box@2x custom custom custom custom NHS Ester, Maleimide, custom 700 nm
IRDye 680RD 680 694 check-box@2x check-box@2x check-box@2x check-box@2x check-box@2x check-box@2x NHS Ester, Maleimide, Carboxylate, DBCO, Azide, Alkyne 700 nm
IRDye 650 651 668 check-box@2x check-box@2x custom check-box@2x check-box@2x check-box@2x NHS Ester, Maleimide, DBCO, Azide, Alkyne, custom

*Data collected using methanol as the solvent.

**IRDye 680LT dye products should not be used for small animal in vivo imaging or In-Cell Western™ Assays. The higher level of fluorescent intensity creates high background making it unfavorable for use in these applications. We recommend using IRDye 680RD dye products for these applications.


Many products from the IRDye Family of infrared dyes are being used in assays from other life science companies:

LI-COR Clinical Translational Research seeks to facilitate the use of IRDye 800CW imaging agents in clinical studies for detection of disease and its progression, and for monitoring of treatment and drug efficacy. Learn More.

Frost & Sullivan Award

LI-COR is honored to have received this prestigious award from Frost & Sullivan.


Scroll to Top