Brilliant green is widely used as a dye in various industries, particularly in the textile sector for coloring fabrics such as silk, wool, and cotton. Its vibrant green hue makes it a popular choice for creating bright and long-lasting colors in garments and other materials.

In the field of microbiology, it serves as a selective agent in culture media to inhibit the growth of certain bacteria while allowing others to thrive. This property is especially useful in laboratories for isolating and identifying specific bacterial strains.

Additionally, it has applications in aquaculture and fish farming as an antiseptic to treat fungal and parasitic infections in fish. Its effectiveness in controlling infections helps maintain the health of aquatic populations.

In some regions, it is also used as a disinfectant for minor wounds and skin infections due to its antiseptic properties. However, its use in medical applications has declined in favor of safer alternatives.

Lastly, it finds use in the paper industry for coloring paper products, adding a distinctive green shade to various types of paper.