Trioctyl Phosphate (TOP) is an organic phosphate compound with the chemical formula C24H51O4P. The following is a detailed introduction:
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Chemical structure
Molecular formula: C24H51O4P
Structural formula: Contains three octyl (C8H17) groups combined with one phosphate group (PO4). -
Physical properties
Appearance: Colorless or light yellow liquid.
Density: About 0.92 g/cm³.
Boiling point: About 220-230°C (under reduced pressure).
Solubility: Soluble in organic solvents, insoluble in water. -
Chemical properties
Stability: Stable at room temperature, but may decompose at high temperature or under strong acid and alkali conditions.
Reactivity: Can be used as a ligand to form a complex with metal ions, and can also participate in reactions such as ester exchange. -
Preparation method
Usually prepared by the reaction of phosphorus oxychloride (POCl3) and octanol (C8H17OH). The reaction needs to be carried out under alkaline conditions and a catalyst is used.
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Application areas
Plasticizer: Used in plastics such as PVC to improve flexibility and processability.
Extractant: used to extract metal ions such as uranium and thorium in hydrometallurgy.
Lubricant: used as lubricant additive to improve lubricity and wear resistance.
Flame retardant: used in polymer materials to improve flame retardant properties. -
Safety and environmental protection
Toxicity: low toxicity, but long-term contact may irritate the skin and eyes.
Environmental impact: not easy to degrade, need to be properly handled to avoid environmental pollution. -
Storage and transportation
Storage: placed in a cool, dry, ventilated place, away from fire and oxidants.
Transportation: transport according to general chemical regulations, avoid severe vibration and high temperature.
Summary：
Trioctyl phosphate is widely used in plasticizing, extraction, lubrication and flame retardancy. Safety and environmental protection should be paid attention to when using it.