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TPPT (Triphenyl Phosphorothioate) Manufacturer - Ashless EP Additive - CAS 597-82-0
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TPPT (Triphenyl Phosphorothioate) Manufacturer - Ashless EP Additive
CAS 597-82-0
Description：
Premium TPPT (Triphenyl Phosphorothioate) supplier for lubricant factories. An ashless Extreme Pressure (EP) agent with excellent thermal stability. CAS 597-82-0. Available with full TDS/MSDS/COA.
Category：
Extreme Pressure (EP) Additive
Product Details
Triphenyl Phosphorothioate (TPPT)
High-Performance Ashless Extreme Pressure (EP) & Anti-wear Additive
CAS Number: 597-82-0 | Abbreviation: TPPT | Grade: Industrial/Technical
I. Product Profile
Triphenyl Phosphorothioate (TPPT) is a specialized organophosphorus-sulfur compound primarily utilized as an ashless extreme pressure (EP) agent. Unlike traditional metallic additives, TPPT provides high-load protection without contributing to ash formation, making it the preferred choice for high-tier industrial lubricants and environments where catalyst poisoning or deposit formation is a concern.
II. Technical Technical Advantages
- Ashless Composition: Leaves no metallic residue, essential for low-ash or ashless oil formulations (e.g., turbine oils, eco-friendly lubricants).
- Exceptional Thermal Stability: Maintains integrity under high-temperature operating conditions where other phosphorus additives might decompose.
- Dual Functionality: Acts as both a load-carrying EP agent and a secondary anti-wear component.
- Hydrolytic Stability: Resists breakdown in the presence of moisture, extending the service life of the lubricant.
III. Physical & Chemical Specifications
Property | Specifications | Test Method |
|---|---|---|
Appearance | White to Off-white Crystalline Powder or Flake | Visual |
Purity | 98.0% | HPLC |
Melting Point | 50°C – 54°C | ASTM D127 |
Phosphorus Content | 8.5% – 9.5% | ICP |
Sulfur Content | 8.8% – 11.5% | ICP |
Acid Value | 0.1 mgKOH/g | ASTM D664 |
Volatility | 0.5% | Thermal Loss |
IV. B2B Application Guide
1. Industrial Gear Oils
TPPT is widely used in heavy-duty gear oils to provide "frictional insurance" during peak load periods. It forms a protective chemical film on gear teeth to prevent scuffing.
2. High-Temperature Greases
Because it is a solid at room temperature (melting point ~52°C) and thermally stable, it is an excellent additive for high-temp lithium complex or polyurea greases used in steel mills and paper plants.
3. Turbine and Compressor Lubricants
Used in ashless formulations where high oxidation stability and wear protection are required simultaneously without affecting the air release properties of the oil.
4. Recommended Dosage
- Industrial Gear Oils: 0.1% – 1.0%
- High-Temperature Grease: 0.5% – 2.0%
- Anti-wear Hydraulic Fluids: 0.05% – 0.5%
V. Compatibility & Synergistic Performance
TPPT is designed to work in tandem with other lubricant components to enhance overall performance:
With Aminic Antioxidants: Demonstrates synergistic effects in high-temperature oxidation control.
With ZDDP: In hybrid formulations, TPPT provides the high-load protection while ZDDP handles primary anti-wear.
Base Oil Compatibility: Highly soluble in Group II and Group III mineral oils at blending temperatures (>60°C). For Group I or PAO, solubility testing is recommended based on specific concentrations.
VI. Quality Assurance & Documentation
Chemost is a professional B2B partner for the global lubricant industry. We provide a complete documentation package for every shipment to ensure seamless QC and compliance:
Technical Data Sheet (TDS)
Material Safety Data Sheet (MSDS)
Certificate of Analysis (COA) per batch
Origin Certification (upon request)
VII. FAQ (Frequently Asked Questions)
Q: Why choose TPPT over traditional sulfurized fats?
A: TPPT is ashless and offers much higher thermal stability. While sulfurized fats are effective for EP, they can be corrosive to yellow metals and decompose at lower temperatures compared to the phosphorus-sulfur structure of TPPT.
Q: How do I handle the solid form of TPPT during blending?
A: For best results, TPPT should be added to the base oil while heating (approximately 60°C - 70°C) with mechanical stirring. Once melted and dispersed, it remains stable in the solution.
Q: Does TPPT affect the copper corrosion rating of the oil?
A: No. TPPT is chemically "yellow-metal friendly" and typically maintains a 1a or 1b rating in the ASTM D130 Copper Strip Corrosion Test.
Contact Our Technical Team
Are you formulating a new ashless gear oil or high-temp grease? Let Chemost provide the technical support you need.
Why Choose Us
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Long-term cooperation cannot be achieved without stable product quality. Under the supervision of over 20 pieces of testing equipment and 70 tests, the quality of the products is qualified and stable.
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Key word：
Triphenyl phosphorothioate
TPPT additive
CAS 597-82-0
Ashless Extreme Pressure agent
lubricant additive supplier
industrial gear oil additives
high-temperature EP agent
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