Cyanine3 azide | CAS 1167421-28-4

Cyanine3 azide is a cyanine-based fluorescent labeling reagent bearing an azide functional group, enabling bioorthogonal click chemistry workflows for attaching a red-orange emitting dye to biomolecules and materials. Its dye core is designed for fluorescence imaging and trace labeling, while the azide handle supports copper-catalyzed or strain-promoted azide-alkyne cycloaddition strategies used in chemical biology and assay development.

1. Biomolecule Click Labeling

Cyanine3 azide is used to generate fluorescently labeled proteins, peptides, and other biomolecules through azide-alkyne click conjugation workflows. Researchers commonly incorporate the dye into labeling pipelines for tracking biomolecule localization, monitoring binding interactions, and constructing fluorescent conjugates for downstream microscopy and fluorescence-based readouts. The azide functionality provides a convenient reactive handle for site-specific attachment when paired with complementary alkyne-bearing partners, supporting consistent dye incorporation into conjugates used in molecular imaging reagent development.

2. Fluorescence Microscopy Tracing

Cyanine3 azide supports fluorescence microscopy experiments where red-orange emission is advantageous for multicolor imaging panels and for visualizing labeled targets in fixed-cell or labeled-sample formats. Chemical biology groups use the reagent to prepare dye-tagged probes and conjugates for cellular and subcellular tracing studies, including workflows that require post-labeling attachment via click chemistry rather than direct dye conjugation. The resulting Cyanine3-containing constructs are frequently used as imaging reagents for qualitative localization and comparative imaging across experimental conditions.

3. Oligonucleotide and Probe Construction

Cyanine3 azide is applied in nucleic acid analysis workflows to build fluorescent oligonucleotide probes and labeled hybridization reagents via click-compatible conjugation. Molecular biology and diagnostics research teams use azide-bearing labeling strategies to attach a cyanine dye to nucleic acid scaffolds or nucleic-acid-associated constructs, enabling fluorescence-based readouts in probe development and nucleic acid assay optimization. This approach is particularly useful when a modular dye attachment strategy is required to standardize probe labeling while maintaining the oligonucleotide's functional integrity for hybridization-based experiments.

4. Surface and Polymer Functionalization

Cyanine3 azide is also used to functionalize biomaterials, polymers, and surfaces with fluorescent tags using click chemistry for materials imaging and labeling. Materials scientists incorporate the azide dye into surface engineering workflows to create fluorescently traceable coatings, labeled hydrogels, or patterned substrates for microscopy-based characterization of material distribution and interactions. By coupling Cyanine3 azide to alkyne-functional surfaces or polymer backbones, researchers can produce stable fluorescent materials that support visualization in imaging and fluorescence screening applications.