Trioctyl Phosphate TOP
| HS Code | 507595 |
| Chemical Formula | C24H51O4P |
| Molar Mass | 434.63 g/mol |
| Appearance | Colorless to pale yellow liquid |
| Odor | Faint, characteristic |
| Density | 0.922 g/cm³ at 20 °C |
| Boiling Point | 405 °C at 760 mmHg |
| Melting Point | -70 °C |
| Flash Point | 207 °C |
| Solubility | Insoluble in water, soluble in many organic solvents |
| Vapor Pressure | Very low |
| Refractive Index | 1.444 (20 °C) |
As an accredited Trioctyl Phosphate TOP factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Trioctyl Phosphate TOP is packaged in thick-walled galvanized iron barrels for industrial grade, with resistant paint inside the barrel, rubber gasket embedded in the lid, and iron hoop reinforced after tightening; reagent grade is placed in brown glass bottles with frosted glass stoppers, wrapped with foam sleeves outside the bottles, and then placed in wooden boxes with grooves to prevent leakage and collision. |
| Storage | Trioctyl Phosphate TOP is stored in a cool and ventilated warehouse, away from fire sources, heat sources and oxidants. The iron barrels should not be stacked in more than two layers, and the glass bottles should be placed upright on special racks to avoid tipping. Open flames are prohibited in the warehouse, and dry powder fire extinguishers are prepared to prevent fire hazards caused by high temperatures. |
| Shipping | Trioctyl Phosphate TOP is transported in a dangerous goods transport vehicle with a "flammable liquid" logo on the vehicle body. Cork boards are placed between barrels to prevent shock. In hot weather, it is stopped during the day and transported at night. In rainy and snowy days, it is covered with oilcloth. If it leaks, it should be surrounded with sand and soil to absorb it, and it should not be allowed to flow into farmland ditches. |
Competitive Trioctyl Phosphate TOP prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please call us at +8615380400285 or mail to sales2@liwei-chem.com.
We will respond to you as soon as possible.
Tel: +8615380400285
Email: sales2@liwei-chem.com
Historical Development
In ancient times, plasticizers were mostly made of tung oil and beeswax. In recent times, the plastic industry has been booming, and plasticizers are needed to change its properties. Craftsmen then developed phosphate esters, and Trioctyl Phosphate TOP was born to meet the needs. When it was first made, the process was rough and the purity was insufficient. After half a century of improvement, it can now be refined and is a good supplement for plastics such as polyvinyl chloride.
Product Overview
Trioctyl Phosphate TOP is a colorless or light yellow oily liquid with a slight ester smell. It is insoluble in water, easily soluble in organic solvents, has moderate viscosity, has both plasticizing and flame retardant functions, is stable, and has low volatility. It is mostly used in plastic and rubber processing.
Physical & Chemical Properties
Trioctyl Phosphate TOP has a density lower than water, feels smooth, has a high boiling point, is non-flammable, is difficult to decompose when heated, is non-corrosive to metals, is slightly irritating to the skin, and has stable properties at room temperature.
Technical Specifications & Labeling
The standard of Trioctyl Phosphate TOP is purity ≥98%, acid value ≤0.1mgKOH/g. The full name of Trioctyl Phosphate TOP must be written on the label, with physical and chemical indicators and safety warnings attached.
Preparation Method
Trioctyl Phosphate TOP is usually prepared with phosphoric acid and n-octanol as raw materials, and heated to reflux reaction with catalyst. After neutralization, water washing, and vacuum distillation, Trioctyl Phosphate TOP is obtained. The process needs to be temperature controlled to prevent the raw materials from volatilizing.
Chemical Reactions & Modifications
Trioctyl Phosphate TOP can be slowly hydrolyzed under strong acid or strong base conditions to generate phosphoric acid and octanol; oxidation reaction will occur when it comes into contact with strong oxidants at high temperature, but the chemical properties are relatively stable at room temperature.
Synonyms & Product Names
Trioctyl Phosphate TOP is also known as "trioctyl phosphate", but in industrial transactions and technical documents, the full name Trioctyl Phosphate TOP must be used to show accuracy.
Safety & Operational Standards
When handling Trioctyl Phosphate TOP, wear protective gloves and goggles to avoid direct contact with the skin. Do not operate near open flames. If it splashes into the eyes, rinse with clean water immediately and seek medical treatment. Wash hands and change clothes after work.
Application Area
Trioctyl Phosphate TOP is mainly used as a plasticizer for plastics such as polyvinyl chloride and cellulose acetate. It can improve the flexibility and cold resistance of the products. It is also used in hydraulic oils and lubricants to improve their performance.
Research & Development
The Artisan Scholar is exploring the application of Trioctyl Phosphate TOP in new environmentally friendly plastics, studying low-toxic production processes, and at the same time developing its potential in high-end lubricating materials to expand its application areas.
Toxicity Research
Trioctyl Phosphate TOP has low toxicity. Long-term contact can cause skin degreasing. Ingestion can irritate the stomach and intestines. Therefore, direct contact should be avoided and stored out of reach of children and livestock.
Future Prospects
As the plastics industry develops towards high performance and environmental protection, the demand for Trioctyl Phosphate TOP will steadily increase, and its process will become greener. It may be expanded to the fields of medical and food packaging plastics to make full use of it.
Where to Buy Trioctyl Phosphate TOP in China?
As a trusted Trioctyl Phosphate TOP 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 Trioctyl Phosphate TOP supplier, we deliver high-quality products across diverse grades to meet evolving needs, empowering global customers with safe, efficient, and compliant chemical solutions.
What are the requirements for the selection of raw materials when preparing Trioctyl Phosphate TOP?
This product is made of phosphoric acid and octanol. Octanol should be selected. Although isooctanol is cheap, it does not react completely and is easy to leave impurities. Phosphoric acid is placed in a stainless steel reactor, and n-octanol is added in a ratio of 1:3. Concentrated sulfuric acid is added as a catalyst, and the amount is 2.5% of the total amount of raw materials. Heat to 140 degrees to make the two esterify and generate water and Trioctyl Phosphate TOP. The water is separated by a water separator and the reaction is continued for five hours. The process is like boiling an ointment. If the purity of n-octanol is not enough, the finished product will be yellow. Therefore, it is necessary to select distilled and purified octanol to obtain colorless and transparent TOP, and the purity can reach 99%.
What is the role of Trioctyl Phosphate TOP in lubricating oil?
This product is a high-quality lubricating oil additive. Adding it to mineral oil can improve the strength of the oil film, reduce the lubrication coefficient by 10%, and reduce mechanical wear. It has a high viscosity index, does not solidify at low temperatures, and does not thin at high temperatures. It is suitable for working conditions from -30℃ to 150℃, so it is often used in automobile engine oils in all seasons. It has a strong affinity with metal surfaces and can form an adsorption film to prevent mechanical parts from rusting. In a humid environment, the anti-rust period is extended to more than half a year. Its good antioxidant properties double the service life of lubricants and reduce the number of oil changes, making it a powerful tool for mechanical maintenance.
What are the characteristics of Trioctyl Phosphate TOP's physical properties?
This product is a light yellow transparent liquid with a slight grease fragrance. The boiling point is about 410 degrees. It is not easy to volatilize at room temperature, so the storage loss is small. It is insoluble in water, easily soluble in hydrocarbon solvents such as gasoline and diesel, and can be mixed with lubricants in any proportion. The density is about 0.92 g/cm3, which is lighter than water. It has moderate fluidity when poured and no wall hanging phenomenon. The viscosity is relatively high, about 35 centipoise at 25°C, and it can form a thick oil film on the friction surface, so it is often used for lubrication of heavy machinery. Its flash point is 220 degrees, and it is a non-flammable liquid. It does not need to be stored away from a fire source, and its safety is better than low-flash point esters.
What are the advantages of Trioctyl Phosphate TOP compared with other phosphate esters?
Compared with Tributyl Phosphate TBP, Trioctyl Phosphate TOP has lower volatility, can be retained longer at high temperatures, and has a long-lasting lubricating effect. Compared with triphenyl phosphate, it has better low-temperature fluidity and can still flow at -30°C, making it suitable for machinery in cold areas. In plasticizing, it has better compatibility with polyvinyl chloride, and there is no precipitation even when the addition amount reaches 40%, making the product softer and improving aging resistance by 30%. It is cheaper than tricresol phosphate and has lower toxicity, so it is more popular in plastics for toys and medical devices.
What precautions should be taken for storage and transportation of Trioctyl Phosphate TOP?
This product needs to be stored in galvanized iron barrels, 200 kilograms per barrel, and the barrel cover is sealed with a rubber gasket to prevent leakage. Store in a ventilated warehouse, the temperature does not exceed 40 degrees, away from fire and oxidants, and isolated from strong acids. Avoid exposure to the sun and rain during transportation, and handle with care during loading and unloading to prevent the barrel from collision and deformation. In case of leakage, cover with sand to absorb it, and do not flush it with water to prevent it from spreading. It has stable properties and is properly stored. There is no obvious change in quality within two years, so it can be stored in batches without frequent turnover.
