Description
Product Introduction
Zinc primary-secondary Alkyl Dithiophosphate is mixed primary-secondary alkyl dithiophosphate zinc salt antioxidant (ZDDP), a kind of antioxidant and anti-corrosion agent. This product features excellent anti-oxidation and anti-wear performance, which can effectively solve the problem of engine cam and tappet’s abrasion and corrosion. It can be widely applied to various oils, especially for high grade gasoline engine oil.
Zinc primary-secondary alkyl dithiophosphate (ZDDP) is a type of additive used in lubricants, particularly in engine oils. It is commonly used in automotive applications to provide wear protection and reduce friction between moving metal surfaces.
ZDDP is composed of two parts: a zinc ion and a primary-secondary alkyl dithiophosphate molecule. The primary-secondary alkyl dithiophosphate molecule consists of an alkyl chain (such as an alkyl group derived from a fatty acid) attached to a dithiophosphate group, which is a phosphate ester with two sulfur atoms.
When ZDDP is added to lubricants, such as engine oil, it forms a protective film on metal surfaces. The zinc ion bonds with metal surfaces, creating a sacrificial layer that helps to prevent wear and corrosion. The alkyl chain of the dithiophosphate molecule provides lubrication and reduces friction between moving metal surfaces.
ZDDP is particularly effective in protecting against metal-to-metal contact and reducing engine wear at high temperatures and pressures. It also provides oxidation and corrosion protection. However, it can interact with certain types of materials, such as catalytic converters, and may have some negative effects on these components.
Overall, ZDDP is an important additive in engine oils and lubricants, providing wear protection and reducing friction in high-pressure and high-temperature applications.
Reference Dosage
The ordinary percentage in usage is 0.5%-2.5%.
| Item | Typical Value | Test Method |
| Appearance | Light Yellow to Amber Transparent Liquid |
Visual Test |
| Color Number | ≤2.0 | GB/T6540,ASTM D1500 |
| Density(20℃),kg/m³ | 1060-1190 | GB/T1884,ASTM D1298 |
| Kinematic Viscosity(100℃),mm²/s | Report | GB/T265,ASTM D445 |
| Flash Point(COC),℃ | ≥180 | GB/T3536,ASTM D92 |
| Sulfur,m% | 14.0-20.5 | GB/T17476,ASTM D5185 |
| Phosphorus,m% | 8.5-9.5 | GB/T17436,ASTM D5185 |
| Zinc,m% | 8.5-10.8 | GB/T17476,ASTM D5185 |
| PH Value | ≥5.8 | SH/T0394,Appendix A |
| Water,m% | ≤0.09 | GB/T260,ASTM D95 |
| Mechanical lmpurities,m% | ≤0.07 | GB/T511 |
Our formulation experts work closely with lubricant manufacturers to:
✅ Fine-tune additive concentrations for optimal performance.
✅ Customize additive packages for specific base oils and application needs.
✅ Improve fuel economy, wear protection, and emissions control.
✅ Develop next-generation solutions for EV fluids and low-viscosity lubricants.
📌 Laboratory Capabilities
Our world-class research and development laboratory is at the forefront of lubricant additive innovation, equipped with advanced tribology, thermal analysis, and real-world engine simulation testing.
With ISO 17025-certified quality control processes, we ensure batch-to-batch consistency, regulatory compliance, and superior performance validation. Our laboratory specializes in:
🔹 High-precision analytical testing (FTIR, TGA, ICP, HPLC).
🔹 Advanced tribology evaluation (Four-Ball, SRV, HFRR friction & wear tests).
🔹 Real-world engine performance assessments (API/ACEA/OEM-certified tests).
🔹 Customized formulation development & optimization.
🔹 Regulatory compliance & certification support.
With a focus on innovation, quality, and performance, we partner with leading lubricant manufacturers to develop next-generation engine oils, industrial lubricants, and EV fluids that exceed market expectations.
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