Congo red is widely utilized in research focused on:

• Histological Staining: This dye is commonly used in histology to stain tissues, particularly for identifying amyloid deposits in diseases like Alzheimer's. Its ability to bind to amyloid fibrils makes it invaluable in pathological studies.
• Biological Research: In microbiology, Congo red is employed to study bacterial biofilms. Its staining properties help visualize biofilm formation, aiding researchers in understanding bacterial behavior and resistance mechanisms.
• Environmental Monitoring: The compound is used in assessing water quality, particularly in detecting the presence of heavy metals and other pollutants. Its sensitivity to environmental changes makes it a useful tool for ecologists.
• Textile Industry: As a dye, it is applied in the textile industry for coloring fabrics. Its vibrant hue and stability under various conditions make it a popular choice for dyeing cotton and other materials.
• Pharmaceutical Applications: Congo red is being explored in drug delivery systems due to its ability to form complexes with certain drugs, enhancing their solubility and bioavailability, which is crucial for effective treatment.