Sodium heptanoate is primarily used in the food industry as a preservative and flavoring agent. It helps extend the shelf life of various food products by inhibiting the growth of bacteria and fungi. Additionally, it is utilized in the production of cosmetics and personal care items, where it acts as an emulsifier and stabilizer to maintain product consistency. In the pharmaceutical sector, it serves as an intermediate in the synthesis of certain drugs. Its antimicrobial properties also make it suitable for use in agricultural applications to protect crops from microbial infections.