Nonadecanedioic acid finds its primary application in the production of high-performance polymers and specialty chemicals. It is used as a monomer in the synthesis of polyesters and polyamides, contributing to the development of materials with enhanced thermal stability, mechanical strength, and chemical resistance. These polymers are often utilized in industries such as automotive, aerospace, and electronics, where durable and heat-resistant materials are essential.

Additionally, it serves as a building block in the creation of lubricants and surfactants, improving their efficiency and longevity. In the field of coatings, nonadecanedioic acid is incorporated to produce finishes that are more resistant to wear, corrosion, and environmental factors. Its versatility also extends to the pharmaceutical and cosmetic industries, where it is used in the formulation of controlled-release drug delivery systems and as an emollient in skincare products.