Dimethyl icosanedioate finds its primary application in the production of high-performance polymers and specialty chemicals. It serves as a key intermediate in the synthesis of long-chain polyesters and polyamides, which are widely used in the manufacturing of durable coatings, adhesives, and fibers. Additionally, it is utilized in the formulation of lubricants and plasticizers, enhancing the flexibility and stability of various materials. In the cosmetics industry, it is incorporated into skincare products for its emollient properties, helping to improve skin texture and moisture retention. Its versatility also extends to the creation of biodegradable materials, contributing to the development of environmentally friendly solutions.