IR-806

IR-806 is an IR-emitting fluorescent dye designed for near-infrared fluorescence labeling and imaging workflows where reduced background from biological autofluorescence is valuable. Its strong absorption in the NIR region and bright emission support use as a tracer in fluorescence microscopy and optical imaging experiments, while its dye-like hydrophobic character is typically leveraged through conjugation to biomolecules or incorporation into labeled materials for stable signal generation. In practical research settings, IR-806 is used to build fluorescent conjugates for localization and tracking studies, including imaging readouts in plate-based formats.

1. Fluorescence Imaging Tracing

IR-806 is frequently used as a near-infrared fluorescent tracer for whole-sample or instrument-based fluorescence imaging, enabling visualization of labeled targets in biological and materials research. Researchers commonly prepare IR-806 conjugates with proteins, peptides, or other targeting ligands to follow distribution and retention in imaging experiments, including time-course studies where NIR emission helps minimize interference from visible fluorophores. This dye's NIR spectral window makes it a practical choice for optical imaging setups that collect red/NIR fluorescence rather than visible-channel microscopy.

2. Fluorescent Labeling Conjugates

IR-806 is applied in fluorescent labeling workflows where a robust NIR dye handle is required to generate research-grade conjugates for downstream imaging and quantification. Many users incorporate IR-806 into biomolecule conjugates to create fluorescent probes for localization studies, binding/uptake experiments, and comparative labeling experiments across experimental conditions. In these workflows, IR-806 labeling is selected to provide trackable fluorescence in the NIR region, supporting multiplexing strategies that separate NIR signals from visible dyes when instrument channels allow.

3. Microscopy NIR Channel Studies

IR-806 supports fluorescence microscopy experiments that rely on near-infrared detection rather than standard green/red visible channels. Microscopy users often employ IR-806-labeled biomolecules or labeled material surfaces to visualize distribution at the cellular or subcellular level using NIR-capable microscope configurations. This approach is particularly common in studies where background autofluorescence from biological samples can obscure visible fluorophores, and where NIR emission provides clearer contrast for imaging-based readouts.

4. Plate-Based Fluorescence Assays

IR-806 is also used in fluorescence assay development and screening workflows that quantify NIR fluorescence in microplates. Researchers prepare IR-806-containing conjugates or labeled reagents to generate measurable fluorescence signals for endpoint readouts, such as binding/interaction measurements, tracer uptake comparisons, and normalization controls in multistep assay formats. The dye's NIR emission is leveraged to reduce overlap with common visible assay dyes, enabling cleaner optical separation when plate readers and filters are configured for NIR detection.