Sulfo-Cyanine3 azide | CAS 1658416-54-6

Sulfo-Cyanine3 azide is a sulfonated cyanine dye click reagent designed for fluorescent labeling workflows that require azide functionality for bioorthogonal conjugation. Its water-soluble, membrane-compatible cyanine fluorophore enables bright fluorescence tracking of biomolecules and materials after azide-based coupling, supporting imaging and assay development where aqueous handling and dye conjugation are important.

1. Biomolecule Labeling

Sulfo-Cyanine3 azide is used by chemical biology and proteomics groups to install a cyanine3 fluorophore onto biomolecules through azide-enabled click conjugation. Researchers commonly incorporate the dye into labeling strategies for proteins, peptides, and other macromolecules that will be visualized by fluorescence microscopy or quantified in fluorescence-based assays. The sulfonated dye format supports aqueous conjugation and downstream handling, making it practical for preparing fluorescent conjugates used in binding studies, localization experiments, and reagent development for molecular imaging workflows.

2. Fluorescent Probe Construction

Sulfo-Cyanine3 azide supports fluorescent probe development where an azide handle is required to assemble imaging reagents from modular components. In probe construction pipelines, teams use the azide dye as a fluorescent reporter that can be linked to targeting ligands, affinity reagents, or scaffold molecules to create conjugated probes for cellular and biochemical imaging experiments. The cyanine3 optical reporter is particularly useful in workflows that rely on visible-range fluorescence readouts, including microscopy-based localization and plate-based fluorescence measurements for monitoring labeled constructs.

3. Surface And Biomaterial Functionalization

Sulfo-Cyanine3 azide is applied in biomaterials science to fluorescently tag surfaces and functional polymers using azide-based coupling strategies. Materials researchers use the dye to generate fluorescently labeled coatings, hydrogels, and surface-modified platforms that can be tracked during material characterization, imaging of interface behavior, or visualization of immobilized biomolecule layers. The sulfonated cyanine format helps maintain dye performance in aqueous environments typical of surface modification and washing steps, enabling robust visualization of functionalized materials in microscopy and related fluorescence characterization workflows.

4. Cell Imaging Labeling Studies

Sulfo-Cyanine3 azide is employed in fluorescence imaging studies where researchers need a cyanine3 reporter introduced via click-compatible azide chemistry. Lab teams use the dye to prepare fluorescently labeled biomolecule conjugates that can be imaged to follow distribution, uptake, or association patterns in cell-based experiments. Its sulfonated nature supports aqueous labeling protocols and helps maintain practical handling during staining and washing, enabling reproducible fluorescence labeling for microscopy readouts in chemical biology and imaging laboratories.