Triethyl Phosphate TEP
| HS Code | 147567 |
| Chemical Formula | C6H15O4P |
| Molar Mass | 182.154 g/mol |
| Appearance | Colorless, odorless liquid |
| Density | 1.068 g/cm³ at 20 °C |
| Boiling Point | 215.2 °C at 760 mmHg |
| Melting Point | -56 °C |
| Solubility In Water | 14 g/L at 25 °C |
| Vapor Pressure | 0.03 mmHg at 25 °C |
| Flash Point | 115.6 °C |
| Refractive Index | 1.4055 at 20 °C |
As an accredited Triethyl Phosphate TEP factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Triethyl Phosphate TEP packaging must prevent leakage and volatilization. Most of them are sealed glass bottles or special plastic barrels. The bottle mouth or barrel cover is sealed with a screw cap and a rubber pad. For example, for liquid storage bottles, the outer layer is covered with a carton to prevent shock. The quantity of each box is fixed for easy handling and counting. The label indicates the full name, specifications, net weight and warnings such as "sealed" and "keep away from fire". |
| Storage | Store Triethyl Phosphate TEP in a cool, ventilated and dry warehouse away from open flames and high temperature sources, such as a fireproof cellar. Do not store it with strong oxidants, strong acids and strong alkalis, as they may react and deteriorate. The container must be placed upright to prevent tipping and leakage. Check the sealing of the container regularly. If there is a volatile odor, replace the packaging in time. |
| Shipping | Transport Triethyl Phosphate TEP in a closed tank truck or a covered truck with a clean compartment free of impurities. During transportation, it should be protected from the sun and rain, and should not be transported with flammable and explosive materials. Drivers should be aware of its characteristics. In case of leakage, the vehicle should be stopped immediately, and the vehicle should be covered with sand to prevent volatilization and diffusion. |
Competitive Triethyl Phosphate TEP prices that fit your budget—flexible terms and customized quotes for every order.
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Historical Development
The history of Triethyl Phosphate TEP began in the early twentieth century, and it was synthesized with the development of organophosphorus chemistry. It was used as an organic synthesis intermediate in the early days, and later its solvent and flame retardant properties were discovered, and it was used in the coating and ink industries. After years of development, the preparation process has matured, from laboratory synthesis to industrial production, and its application has expanded to plastics, medicine and other fields, becoming a commonly used chemical additive.
Product Overview
Triethyl Phosphate TEP is a colorless and transparent liquid with a slight ester smell. It is easily soluble in water and most organic solvents, and its chemical properties are relatively stable. It is mainly used as a solvent, flame retardant and organic synthesis intermediate. It helps the reaction go smoothly in industry and improves product performance. It is a practical chemical material.
Physical & Chemical Properties
Triethyl Phosphate TEP, boiling point is about 215℃, density is less than water, viscosity is low. It is moderately volatile, easily decomposed at high temperature, and releases toxic gases. It is chemically stable, does not react with water at room temperature, burns when exposed to strong heat or open flame, and easily reacts with strong oxidants, which are its main characteristics.
Technical Specifications & Labeling
The specifications of Triethyl Phosphate TEP are purity must be above 99%, water content ≤0.1%, and acidity (calculated as phosphoric acid) ≤0.02%. The label book contains the full name of the product Triethyl Phosphate TEP, manufacturer, production date, shelf life, "flammable", "avoid inhalation of vapor", etc., and the implementation standard is attached.
Preparation Method
Triethyl Phosphate TEP is usually prepared with ethanol and phosphorus oxychloride as raw materials. Mix in proportion, add dropwise reaction at low temperature, add alkali to neutralize the generated hydrochloric acid, and purify by distillation to obtain the finished product. Temperature control is required during the reaction to prevent volatilization, and fractions are separated accurately during purification to ensure product purity.
Chemical Reactions & Modifications
Triethyl Phosphate TEP burns at high temperature to generate phosphate derivatives, carbon dioxide and water. It can be hydrolyzed under acidic or alkaline conditions to generate ethanol and phosphoric acid. By changing the reaction conditions, it can undergo ester exchange reactions with other compounds to generate different phosphates, expanding its application range.
Synonyms & Product Names
Triethyl Phosphate TEP, also known as triethyl phosphate, is a common name in different documents and industries, referring to this liquid chemical additive.
Safety & Operational Standards
When operating Triethyl Phosphate TEP, you need to wear rubber gloves and goggles, and the workplace should be well ventilated and equipped with a gas mask. If the vapor is inhaled, move to a place with fresh air; if it comes into contact with the skin, wash it with soapy water; if it is accidentally ingested, seek medical attention immediately. Smoking is prohibited nearby, and explosion-proof equipment should be used.
Application Area
Triethyl Phosphate TEP is widely used. It is used as a flame retardant and plasticizer in the plastics industry; as a solvent and catalyst in organic synthesis; as a solvent in coatings and inks to improve leveling; and is also used in the synthesis of pharmaceutical intermediates. It can play a role in many chemical fields.
Research & Development
Today, researchers on Triethyl Phosphate TEP focus on improving the preparation process, increasing yield, and reducing the discharge of three wastes. Explore its application in emerging fields such as new energy battery electrolytes and environmentally friendly solvents, and meet the needs of high-end industrial development through performance optimization.
Toxicity Research
According to Toxicity Research, Triethyl Phosphate TEP is toxic to a certain extent. Its vapor irritates the eyes, nose, and respiratory tract. High-concentration contact may cause headaches and nausea, and long-term contact affects health. Therefore, strict protection is required during operation to avoid excessive exposure.
Future Prospects
The future of Triethyl Phosphate TEP is related to the development of fine chemicals, new energy and other industries. If breakthroughs can be made in the preparation of high-purity products and environmentally friendly applications, and expansion into the fields of electronic chemicals and green solvents, the market demand will continue to grow and the industry prospects are promising.
Where to Buy Triethyl Phosphate TEP in China?
As a trusted Triethyl Phosphate TEP manufacturer, we deliver:
Factory-Direct Value: Competitive pricing with no middleman markups, tailored for bulk orders and project-scale requirements.
Technical Excellence: Precision-engineered solutions backed by R&D expertise, from formulation to end-to-end delivery.
Whether you need industrial-grade quantities or specialized customizations, our team ensures reliability at every stage—from initial specification to post-delivery support.
As a leading Triethyl Phosphate TEP supplier, we deliver high-quality products across diverse grades to meet evolving needs, empowering global customers with safe, efficient, and compliant chemical solutions.
How is Triethyl Phosphate TEP prepared?
To make this product, phosphoric acid and ethanol are used as raw materials, and they are placed in a copper reactor in a ratio of 1:5. Concentrated sulfuric acid is added as a catalyst, and its amount is 3% of the total raw material. It is heated to 80 degrees to make the two react with esterification to produce water and Triethyl Phosphate TEP. The water is separated by a water separator and the reaction is continued for three hours. The process is like brewing vinegar, which requires reflux condensation to recover excess ethanol and stop the fire when no water drips out of the water separator. After the reaction, the remaining acid is neutralized, distilled and purified, and the 150-degree fraction is collected to obtain a colorless and transparent liquid with a purity of 98%. This method is like cooking soup. The taste is pure if the heat is even, so the temperature cannot be increased or decreased suddenly, otherwise impurities are easily generated.
What is the role of Triethyl Phosphate TEP in organic synthesis?
This product is a good material for ethylation reagents. In drug synthesis, it can ethylate amines, such as ethylating aniline to N-ethylaniline, with a yield of 85%. In the pesticide industry, it can ethylate phenolic compounds to synthesize insecticides, such as ethyl p-nitrophenol. Its reaction conditions are mild, no high pressure is required, it is more stable than iodoethane, and it is not easy to decompose, so it is often used in laboratories. In polymer synthesis, it is used as a polymerization initiator to regulate the molecular weight distribution of resins and make the product performance uniform. Its ethyl transfer ability is moderate and does not damage other functional groups, so it is a common product in synthetic chemistry.
What are the characteristics of Triethyl Phosphate TEP's physical properties?
This product is a colorless liquid with a slight ether fragrance, a boiling point of 150 degrees, a melting point of minus 50 degrees, good fluidity at room temperature, and no worries about crystallization. It is easily soluble in water, with a solubility of 14%. It is also easily soluble in organic solvents such as ethanol and ether, and releases heat when mixed with water. The density is about 1.07 g/cm3, which is slightly heavier than water. It is in the form of thin lines when poured and does not hang on the wall. The refractive index is 1.405, with good light transmittance. It can be used as an optical instrument cleaner to remove oil stains without damaging the lens. Its flash point is 50 degrees, and it is a flammable liquid. It needs to be stored away from fire sources, and it needs to be more careful about fire prevention than TPP.
What are the differences between the application scenarios of Triethyl Phosphate TEP and TPP?
Triethyl Phosphate TEP is mostly used in organic synthesis and solvents. Because it is easily soluble in water, it is suitable for water-based coatings and inks; Triphenyl Phosphate TPP is mostly used for plastic flame retardant. Because of its high melting point, it is suitable for resins processed at high temperatures. In the pharmaceutical field, TEP is used as an ethylating agent, and TPP is used as a drug carrier to release drug ingredients. In the textile industry, TEP can be used as a dye solvent, and TPP is used as a flame retardant finishing agent. Although both belong to the same phosphate ester, they have different application areas due to different solubility and stability, just like birds of the same genus, but one is good at singing and the other is good at flying, each suitable for its own use.
What are the specifications for the storage and transportation of Triethyl Phosphate TEP?
This product should be packed in galvanized iron barrels, sealed with rubber gaskets, and stored in a cool and ventilated warehouse at a temperature not exceeding 25 degrees, away from oxidants and fire sources. The warehouse should be equipped with fire extinguishers, and open flame operations are prohibited. It should not be transported in the same vehicle as strong acids. The barrel should be labeled "flammable liquid" and handled with care during loading and unloading to prevent impact and leakage. In case of leakage, it should be covered with sand and not flushed with water to prevent flow and spread. Its steam is irritating, so you need to wear a gas mask when operating it, such as a face mask to prevent dust, and you need to be careful.
