Brilliant Blue FCF is extensively used as a water tracer agent. Due to its ability to retain color for long periods of time, Brilliant Blue FCF outperforms other dye tracers. Additionally, Brilliant Blue FCF has a low toxicity level that is favorable for the environment. However, Brilliant Blue FCF has different impacts on varying soils. Brilliant Blue FCF is attracted to and sorbed in acidic soils due to its large size and ionic charge. Soil composition and flow velocity also affect the level of sorption of Brilliant Blue FCF.