631-45-8

Basic information

• Product Name: Tri-o-tolylthiophosphate
• Synonyms: Tri-o-tolyl Thiophosphate; O,O,O-tris(2-methylphenyl) phosphorothioate
• CAS NO: 631-45-8
• Molecular Formula: C₂₁H₂₁O₃PS
• Molecular Weight: 384.43
• Mol File: 631-45-8.mol
• Article Data: 4

Chemical Properties

• Boiling Point: 476.8°C at 760 mmHg
• Flash Point: 242.1°C
• Appearance: /
• Density: 1.222g/cm³
• Vapor Pressure: 8.55E-09mmHg at 25°C
• Refractive Index: 1.612
• CAS DataBase Reference: Tri-o-tolylthiophosphate(CAS DataBase Reference)
• NIST Chemistry Reference: Tri-o-tolylthiophosphate(631-45-8)
• EPA Substance Registry System: Tri-o-tolylthiophosphate(631-45-8)

Safety Data

• Hazardous Substances Data: 631-45-8(Hazardous Substances Data)

Usage

Description

Tri-o-tolylthiophosphate is a phosphorothioate ester of o-tolyl, known for its high thermal stability and extreme pressure properties. It is commonly used as an antiwear and antioxidant additive in lubricants and hydraulic fluids.
Used in Lubricant Industry:
Tri-o-tolylthiophosphate is used as an antiwear and antioxidant additive for improving the performance and longevity of moving mechanical parts by reducing friction and minimizing wear and tear.
Used in Hydraulic Fluid Industry:
Tri-o-tolylthiophosphate is used as an additive in hydraulic fluids to enhance their thermal stability and extreme pressure properties, ensuring smooth operation and maintenance of machinery and equipment.
Used in Grease Formulation:
Tri-o-tolylthiophosphate is used as a key component in the formulation of greases to provide protection against wear and tear, as well as to improve the thermal stability of the grease.
Used in Gear Oil Industry:
Tri-o-tolylthiophosphate is used as an additive in gear oils to enhance their antiwear and antioxidant properties, ensuring efficient operation and reducing wear in gears.
Used in Metalworking Fluid Industry:
Tri-o-tolylthiophosphate is used in the formulation of metalworking fluids to improve their performance, reduce friction, and minimize wear during metalworking processes.
Note: The use of Tri-o-tolylthiophosphate should be handled with caution and in compliance with safety regulations due to its potential environmental and health hazards.

InChI:InChI=1/C21H21O3PS/c1-16-10-4-7-13-19(16)22-25(26,23-20-14-8-5-11-17(20)2)24-21-15-9-6-12-18(21)3/h4-15H,1-3H3

Upstream product

• 2622-08-4 tri(O-methylphenyl)phosphite 
• 95-48-7 ortho-cresol 

Relevant articles and documents

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Method for preparing phosphate ester derivatives from white phosphorus

A method for preparing phosphate ester derivatives from white phosphorus relates to the field of chemical engineering, and comprises the following steps: adding alkali, a catalyst, a white phosphorus solution, ROH or RSH (R represents alkyl or aromatic group) into a reaction container in an inert atmosphere, and heating and stirring the mixture in a mixed solvent of toluene and DMSO (dimethyl sulfoxide) to react for a certain time, so as to obtain three-coordinated phosphate ester derivatives; and 2) continuing to add H2O2, air or sulfur powder until the oxidation is completed, thereby obtaining the tetra-coordinated phosphate ester derivative. According to the method, chlorine, phosphorus trichloride and halogen are not needed, phosphite ester is directly prepared from elementary white phosphorus in an efficient, green and environment-friendly manner, and phosphate and thiophosphate can be directly prepared after oxidation. High pollution and high corrosivity of a traditional method are avoided in the whole process; meanwhile, white phosphorus is completely converted in the whole process, white phosphorus residues are avoided, and the post-reaction treatment process is safe.

NEW METHOD FOR THE SYNTHESIS OF O,O-DIARYL HYDROGEN PHOSPHORODITHIOATES, O,O,O-TRIARYL PHOSPHOROTHIOATES, AND TETRAKIS(ARYLOXY)DIPHOSPHINE

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