Triethyl phosphate (TEP) is an organophosphate compound with the chemical formula (C₂H₅O)₃PO. It is used as a solvent, flame retardant, and plasticizer in various industrial applications.

TEP is widely used as a solvent in chemical production and laboratory work. It is also effective as a plasticizer in the production of polymers and in the plastics industry. Additionally, it can be used as a softening agent and flame retardant in textile dyes and finishes.

Due to its flame retardant properties, TEP is utilized as a fire-resistant additive to enhance the fire resistance of combustible materials. It is commonly used in industrial coatings, the furniture industry, and electronic components.

Proper safety precautions should be taken when handling TEP. Adequate ventilation should be ensured, and appropriate personal protective equipment should be used. It is important to follow relevant instructions and safety procedures.