Nonylphosphonic acid is widely used as a corrosion inhibitor, particularly in industrial water treatment systems. It effectively prevents the degradation of metal surfaces by forming a protective layer, which is essential in cooling towers, boilers, and pipelines.

In the field of agriculture, it serves as a chelating agent, helping to improve the availability of essential nutrients to plants by binding metal ions in the soil. This enhances plant growth and crop yield.

Additionally, it is utilized in the production of specialty chemicals, such as surfactants and detergents, where its phosphonic acid group contributes to stability and performance in various formulations.

In the oil and gas industry, it is employed as a scale inhibitor, preventing the buildup of mineral deposits in drilling equipment and pipelines, thereby ensuring efficient operations.

Its role in the synthesis of organic compounds, particularly in pharmaceutical and chemical research, is also notable, where it acts as a reagent or intermediate in various reactions.