Lucifer yellow CH ammonium salt | CAS 188904-20-3

Lucifer yellow CH ammonium salt is a highly water-soluble, anionic fluorescein-like dye used for fluorescent labeling and tracer studies. Its strong visible fluorescence supports sensitive visualization in microscopy and fluorescence readouts, while its charge and hydrophilicity make it convenient for aqueous sample formats. In many workflows, it is selected as a robust, readily detectable dye for mapping transport, uptake, and distribution in biological and materials contexts.

1. Fluorescence Tracer Studies

Lucifer yellow CH ammonium salt is frequently used as a fluorescent tracer to visualize diffusion, permeation, and transport pathways in aqueous systems. Researchers employ it to track how molecules move through membranes, hydrogels, and porous materials, where the dye's water solubility supports consistent dispersion in buffer. In microscopy-based studies, the dye's bright emission enables straightforward spatial mapping of transport fronts and uptake patterns in experimental setups such as diffusion chambers, membrane inserts, and scaffold diffusion assays.

2. Membrane Permeability Assays

Lucifer yellow CH ammonium salt is commonly incorporated into membrane permeability and barrier-function experiments where a fluorescent readout is preferred over colorimetric endpoints. Investigators use it to quantify relative transport across biological membranes or engineered barrier layers by monitoring fluorescence intensity in receiver compartments or by imaging distribution across the membrane plane. Because the dye is compatible with standard fluorescence plate readers and imaging systems, it is often selected for comparative studies of permeability under different buffer conditions, treatments, or material formulations.

3. Cell and Tissue Imaging

Lucifer yellow CH ammonium salt is applied in cellular and tissue imaging workflows to visualize dye uptake, intracellular distribution, and extracellular retention patterns. In microscopy experiments, it can serve as a practical labeling/tracing reagent for mapping how aqueous tracers localize within experimental samples, including fixed or prepared specimens where dye distribution is the primary measurement. The dye's strong visible fluorescence supports routine imaging and enables quantitative analysis of spatial intensity profiles when paired with appropriate excitation/emission filter sets.

4. Flow Cytometry Labeling

Lucifer yellow CH ammonium salt is used as a fluorescence label for flow cytometry-based readouts in labeling and uptake experiments. Researchers introduce the dye into cell suspensions or assay mixtures and then analyze fluorescence intensity shifts to assess relative internalization or association with cell populations. Its water solubility and compatibility with common fluorescence detection channels make it a convenient tracer dye for gating-based comparisons in cell biology workflows and screening-style experiments where uptake or distribution is the measured outcome.