Trihexyl phosphate (THP)

Basic Info:

  • Chemical Synonym(s): phosphoric acid triethyl ester; TEP; Phosphoric ether; AURORA KA-1638; Phosphoric acid, triethyl ester; Triethylfosfat;
  • Read More
  • CAS Number: 78-40-0
  • Chemical Formula:


  • MSDS: Download


Boiling Point
Melting Point
Flash Point
Vapor density
6.28 (vs air)
Vapor pressure
1 mm Hg ( 40 °C)
Refractive index
n20/D 1.403(lit.)
240 °F
Quote Now

We help you source Trihexyl phosphate (THP) in China

Our Advantages:

China currently plays a very important role in the world market for plastic additives, with 168, 1010, DSTDP, DLTDP, 977 and 365 being the most produced products in the world.
The price of plastic additives varies significantly with oil, while the cost correlation between antioxidants and palm oil is high.
Since 2020, the number of black swan events in the world has increased, resulting in dramatic changes in raw material prices.
Companies such as UPP, SONGWON, PMC, LG, etc. have been alerted by us in time and have avoided many losses.

We have a 20+ year track record of working with suppliers in China and rating reports on them, and we keep our suppliers updated with the latest news so our customers can get the latest supplier reports. We know the market well and have early warning notifications on upstream raw material prices to help you build a stable supply chain.

When selecting suppliers, our procurement specialists will audit the qualification of suppliers, conduct thorough investigations such as field visits and sample testing, and make ratings to ensure the authenticity and legality of supplier information.

We have a long-term stable cooperation with GLP laboratories, encounter customer test results and supplier test results do not match the situation, we will commission a third party to test to ensure the accuracy, authenticity and reliability of the experimental results. In this way, we can effectively control the product quality problems.

We have a long-term cooperative warehouse and can follow up packaging and labeling according to safety regulations and customer requirements. In order to effectively prevent damage to the goods in transit, we have prepared various reinforcement measures and packaging solutions.

We have a number of international freight companies with whom we have long-standing cooperation, and we can choose several route options according to the customer's requirements. For more difficult or urgent orders, we will prepare several alternative solutions to ensure safe and timely delivery.


We promise to immediately and unconditionally exchange or return the goods if they have quality problems. Our employees who deal with after-sales issues have many years of international work experience and are familiar with various processes in multinational work, so they can communicate and deal with after-sales issues without any obstacles.

Request a quote for Trihexyl phosphate (THP)


Trihexyl phosphate (THP) is a chemical compound used as a plasticizer and an additive for plastic, rubber and paint.

It is a clear and colorless syrupy liquid that is insoluble in water. It is widely used as a plasticizer and additive in the PVC and polyurethane industries and as a flame retardant and stabilizer in the rubber and coatings industries.

It is a chemical compound used as an additive in both diesel fuel and biodiesel. Diesel additive manufacturers often use it to stabilize their products. When added to the fuel, it helps increase the number of miles driven using a single tank. It also helps to improve the overall performance of the fuel.

It is a corrosion inhibitor and a rust preventative that can penetrate rusting metal to form a rust conversion coating. 


Trihexyl phosphate (THP) is used for making clothing, aluminum extrusions, textiles, foams, paint, wood, etc. Generally, it is used as a flame retardant additive. It is used to improve the fire retardant ability of the flame retardant.

It is a widely used corrosion inhibitor which is a retarding compound for water-based paints and coating. 

It is a flame retardant chemical widely used in commercial and domestic applications. It is used as a flame retardant for a vast range of plastics and resins, particularly for those used in insulation.

It gives excellent fire retardant properties to the polymer materials. The major application of this chemical is in commercial and domestic appliances. This chemical has low moisture absorption and excellent thermal stability, and it is non-corrosive to metals. 

Related Products: