Trioleyl phosphite is widely used as a stabilizer in the polymer and plastics industry. It helps prevent the degradation of polymers during processing and extends the lifespan of the final products by protecting them from heat, light, and oxidation. This chemical is particularly effective in polyolefins, such as polyethylene and polypropylene, where it enhances their durability and performance.

In the lubricant industry, trioleyl phosphite acts as an antioxidant and anti-wear additive. It improves the thermal stability of oils and greases, reducing the formation of sludge and deposits. This ensures smoother operation and longer service life of machinery and engines.

Additionally, trioleyl phosphite is utilized in the synthesis of specialty chemicals, where it serves as an intermediate in the production of various phosphorous-containing compounds. Its ability to act as a reducing agent and stabilizer makes it valuable in organic synthesis and industrial chemical processes.