Sodium nonanoate is primarily used as a surfactant in various cleaning products due to its ability to reduce surface tension and enhance the removal of dirt and grease. It is commonly found in household detergents, dishwashing liquids, and industrial cleaners. Additionally, it serves as an emulsifying agent in personal care products like shampoos and soaps, helping to blend oil and water-based components effectively. In agriculture, sodium nonanoate is utilized as a herbicide to control weeds, particularly in organic farming, as it disrupts plant cell membranes upon contact. Its antimicrobial properties also make it a useful ingredient in certain disinfectants and sanitizers.