sulfo-Cyanine7.5 amine

Sulfo-Cyanine7.5 amine is a water-soluble cyanine dye bearing a reactive amine handle for conjugation to biomolecules and materials. Its near-infrared fluorescence supports imaging workflows where reduced background and deeper tissue penetration are often advantageous, and the sulfonate substituents help maintain aqueous compatibility during labeling and wash steps. Researchers use this dye to build fluorescent conjugates for microscopy, optical tracking, and fluorescence-based assay development.

1. Bioconjugate Fluorescent Labeling

Sulfo-Cyanine7.5 amine is widely used by chemical biology and biomaterials groups to fluorescently label proteins, peptides, and other amine-containing targets for optical readouts. The dye's reactive amine enables straightforward incorporation into labeling strategies that produce stable, water-compatible conjugates suitable for downstream purification and imaging. Typical users include investigators preparing fluorescent standards, labeling affinity reagents, or generating NIR imaging tracers for method development and workflow validation.

2. Fluorescence Imaging Tracers

Sulfo-Cyanine7.5 amine is used as a near-infrared fluorescence tag for cellular and molecular imaging experiments where optical tracking is required over multiple wash and incubation steps. Researchers commonly incorporate the dye into conjugates that are then visualized by fluorescence microscopy or imaged using NIR-capable optical systems to monitor localization, binding behavior in assay formats, or distribution of labeled biomolecules in complex samples. The sulfonated, water-soluble character supports practical handling in aqueous buffers used in imaging workflows.

3. NIR Bioassay Development

Sulfo-Cyanine7.5 amine supports fluorescence assay development in which a robust NIR fluorophore is needed as a reporter on biomolecular reagents. Assay developers use dye-labeled constructs to generate fluorescent readouts for binding studies, reagent tracking, and protocol optimization in microplate or benchtop fluorescence measurements. The dye's compatibility with aqueous assay buffers and its conjugation-ready functionality make it a practical component for building fluorescence-based detection reagents used in screening and analytical method development.

4. Polymer And Surface Functionalization

Sulfo-Cyanine7.5 amine is also applied in materials research to introduce NIR fluorescent functionality into polymer systems and functional surfaces for optical characterization. Materials scientists use the dye to prepare fluorescently labeled coatings, probes, or labeled biomaterial components that can be imaged to assess distribution, surface retention, or labeling uniformity. The dye's sulfonate-driven water compatibility helps integrate the fluorophore into aqueous processing steps commonly used for biomaterials and surface modification studies.