Diethyl phosphate (DEEP) is a colorless or slightly yellow transparent liquid with a slight ester odor. It is miscible with various organic solvents such as alcohols, ketones, and aromatic hydrocarbons, and slightly soluble in water. It has low viscosity and low volatility. This product is a commonly used phosphorus flame retardant and plasticizer, which has dual functions of flame retardant and plasticizer. It is widely used in polyurethane foam, epoxy resin, phenolic resin, coatings, adhesives and other systems, and can also be used as an organic synthetic intermediate to improve the flame retardancy and flexibility of materials. Conventional packaging often uses 25kg, 200kg plastic drums or iron drums, and tank truck filling can also be provided according to demand. When storing, it should be placed in a cool, dry, and ventilated warehouse, sealed and kept away from sources of fire, heat, and strong oxidants. It should be protected from direct sunlight and rain to prevent material volatilization, oxidation, and deterioration. It should be stored and transported as a general flammable liquid chemical.