Exalite 404 | CAS 188652-84-8

Exalite 404 is a fluorescent dye used as a staining and labeling reagent in fluorescence-based workflows where a robust visible-light emission readout is required. In practice, Exalite 404 is handled as a small-molecule fluorophore that can be incorporated into labeling protocols for imaging and analytical readouts, including applications that benefit from straightforward dye-to-sample workflows and compatibility with standard fluorescence microscopy and fluorescence detection instrumentation.

1. Fluorescence Microscopy Staining

Exalite 404 is used by microscopy-focused laboratories to visualize labeled samples under fluorescence illumination, including routine staining of prepared specimens and fluorescence imaging of dye-associated materials. Researchers often select Exalite 404 when they need a direct fluorescent label for sample contrast, where the dye's emission supports clear imaging on common microscope fluorescence channels. This makes it a practical choice for method development in cellular imaging workflows, materials characterization, and comparative imaging studies where dye localization or dye uptake can be monitored visually.

2. Fluorescent Labeling For Assays

Exalite 404 is applied in fluorescence assay development as a labeling fluorophore for constructing dye-based readouts in benchtop screening and analytical experiments. Teams in chemical biology and biomaterials research use Exalite 404 to generate fluorescent signal from labeled components, enabling readout by plate readers or benchtop fluorescence detectors depending on the assay format. Its use is especially common in workflows where a stable dye signal is needed to track labeling efficiency, sample-to-sample variation, or reagent performance in fluorescence-based measurements.

3. Polymer And Surface Labeling

Exalite 404 is frequently used in materials science and biomaterials research to introduce fluorescence into polymers, coatings, and other functionalized surfaces for imaging and tracking studies. Researchers incorporate Exalite 404 into labeling strategies aimed at visualizing distribution, adsorption, or retention of dye-containing materials, supporting studies of surface modification and material processing. This application is common in laboratories that need a fluorescent tag to follow how a material behaves during handling, washing, or processing steps, with the dye providing a convenient optical handle for characterization.

4. Fluorescence Detection Standards

Exalite 404 is also used as a fluorescent reference dye in analytical and instrumentation workflows where consistent fluorescence response is valuable. Laboratories employ Exalite 404 in method qualification and calibration-style activities for fluorescence detection systems, supporting routine checks that the optical detection pathway is performing as expected. This use case is particularly relevant for teams running comparative fluorescence measurements across experiments, where having a reproducible dye signal helps maintain consistency in fluorescence-based analytical routines.