Evaluates risks to human health and the environment posed by the production and use of tri-n-butyl phosphate. Tri-n-butyl phosphate is widely used worldwide as a solvent for cellulose esters, lacquers, and natural gums, as a primary plasticizer in the manufacture of plastics and vinyl resins, in the formulation of fire-resistant aircraft hydraulic fluids, and as an antifoaming agent, mainly in paper manufacturing plants.