Cy7.5 | CAS 847180-48-7

Cy7.5 is a near-infrared fluorescence dye used as a robust labeling fluorophore in optical imaging workflows where reduced background from biological autofluorescence is advantageous. Its extended-wavelength emission supports sensitive visualization in fluorescence microscopy and NIR imaging systems, and its dye-like small-molecule format is commonly leveraged to prepare labeled probes, conjugates, and imaging standards through established dye-conjugation strategies.

1. Near-Infrared Imaging Tracing

Cy7.5 is frequently employed by imaging scientists and instrumentation-focused laboratories to generate near-infrared fluorescence tracers for whole-sample or compartmental optical readouts. Researchers use Cy7.5-labeled conjugates to follow distribution and retention of tagged biomolecules, polymers, or engineered materials in NIR-capable imaging setups, where the longer emission wavelengths help reduce interference from visible-range fluorophores. This makes Cy7.5 a practical choice for developing imaging reagents intended for fluorescence imaging workflows and optical quantification.

2. Fluorescent Conjugate Labeling

Cy7.5 is widely used in chemical biology and biomaterials research to introduce a near-infrared reporter into proteins, peptides, and other labeling targets as part of fluorescent conjugate preparation. Teams in assay development and molecular imaging commonly incorporate Cy7.5 into labeled constructs to enable downstream fluorescence detection in gel-based readouts, imaging assays, and instrumented fluorescence measurements. In these workflows, the dye's NIR spectral region supports multiplexing strategies with visible fluorophores and helps maintain signal visibility in complex sample matrices.

3. Fluorescence Microscopy Readouts

Cy7.5 supports fluorescence microscopy applications where near-infrared emission is collected to visualize labeled structures with minimized background from common cellular autofluorescence. Researchers use Cy7.5-containing labeling reagents to track fluorescently tagged biomolecules or material components at the microscope level, typically with NIR-capable filter sets and detectors. This positioning is especially relevant for experiments that require clear separation from green/red channel signals or that benefit from NIR imaging contrast during cellular or subcellular studies.

4. Imaging Standards And Controls

Cy7.5 is also used by assay developers and analytical method teams to prepare fluorescence standards and reference controls for instrument calibration and method verification. Laboratories often incorporate Cy7.5 materials into workflow controls for NIR fluorescence measurements, enabling consistent normalization across runs and supporting comparative quantification when multiple samples or batches are analyzed. This use is common in fluorescence instrumentation settings where stable, wavelength-matched reference signals improve the reliability of routine imaging and analytical readouts.