Description
Ash Free Antioxidant is a kind of multipurpose ashless additive. It not only has outstanding anti-oxidation performance, but also has great abrasion resistance and extreme pressure properties. Meanwhile, it has excellent compatibility with other additives, can be used for steam turbine oil, hydraulic oil, gear oil, internal combustion engine oil and other kinds of oil for the improvement of their anti-oxidation and abrasion resistance. It’s also an effective extreme-pressure additive for lubricating grease.
| ltem | Typical Value | Test Method |
| Appearance | Light Yellow Light Brown Transparent Liquid |
Visual |
| Density(20℃),kg/m³ | 1050-1100 | GB/T1884,ASTM D1298 |
| Kinematic Viscosity(100℃),mm²/s | 14.0-17.0 | GB/T265,ASTM D445 |
| Sulphur,m% | 26.5-32.5 | GB/T17476,ASTM D5185 |
| Flash Point(COC),℃ | ≥170 | GB/T3536,ASTM D92 |
| Water,m% | ≤0.1 | GB/T260,ASTM D95 |
| Mechanical lmpurities,m% | ≤0.1 | GB/T511 |
📌 Extreme Temperature Lubricant Testing
Our state-of-the-art laboratory specializes in high-temperature and low-temperature performance evaluation for industrial lubricants, automotive oils, and specialized greases. Using advanced thermal analysis and extreme condition simulation, we ensure your lubricants deliver optimal performance, extended service life, and equipment protection under harsh conditions.
🔹 High-Temperature Performance Evaluation
✅ Oxidation Stability (RPVOT, ASTM D2272, ASTM D943) – Ensures extended lubricant lifespan under heat exposure.
✅ Thermal Stability & Deposit Control (CEC L-105-12, ASTM D2893) – Prevents sludge and varnish formation in industrial gear and hydraulic systems.
✅ High-Temperature Shear Resistance (HTHS, ASTM D4683) – Maintains viscosity and load-bearing capabilities at extreme temperatures.
🔹 Low-Temperature Flowability & Protection
✅ Cold Start & Pumpability (CCS, MRV, ASTM D5293, ASTM D4684) – Ensures smooth lubricant circulation in frigid conditions.
✅ Extreme Low-Temperature Performance (-40°C to -60°C) (ASTM D2983, DIN 51805-2) – Guarantees fluidity for aviation, industrial, and arctic lubricants.
✅ Gear & Bearing Oil Cold Temperature Reliability (FE-8/FE-9, ASTM D4693) – Prevents lubrication failure in heavy-duty industrial applications.
We provide customized testing solutions for:
✅ Industrial gear oils, hydraulic fluids, turbine oils, and compressor lubricants.
✅ Automotive & commercial engine oils requiring high/low temperature stability.
✅ Specialized lubricants for aerospace, military, and extreme climate applications.
With ISO 17025-certified methodologies, our lab ensures compliance with API, ACEA, DIN, ASTM, and OEM specifications, helping you develop next-generation high-performance lubricants for extreme environments.

Shanghai Minglan Chemical Co., Ltd. is a high-end enterprise focusing on the research and development and production of lubricant additives. It has modern factories and advanced laboratories, providing high-performance additive solutions for global lubricant manufacturers.
🔹 Factory strength – Our production base is equipped with fully automatic reactors, precise batching systems and intelligent filling equipment to ensure efficient production and stable supply.
🔹 Laboratory capabilities – Our R&D center is equipped with advanced equipment such as tribology testing, oxidation stability evaluation, viscosity control and extreme temperature simulation testing to provide customers with efficient customized formulation support.
🔹 Quality control – Strictly follow ISO 9001, ISO 14001 and API/ACEA industry standards to ensure that each batch of products meets international specifications and customer needs.

Ash Free Antioxidant Dialkyl Dithiocarbamate
Ash Free Antioxidant is composed of a variety of organic compounds and has excellent antioxidant properties and metal ion binding capabilities.
Ashless antioxidants refer to a class of additives that can prevent or delay the oxidative deterioration of lubricating oil and extend the service life of lubricating oil. As one of the representatives of ashless antioxidants, T323 has broad application prospects in the field of lubricants.
Shanghai Minglan Chemical Co., Ltd. uses a unique formula and advanced production technology to make T323 have higher antioxidant properties and more stable physical and chemical properties.
An ash-free antioxidant is a type of chemical additive used in lubricating oils and other industrial fluids to prevent or slow down the oxidation process. Oxidation is a chemical reaction that occurs when the oil reacts with oxygen, leading to the formation of harmful by-products such as sludge, varnish, and acids. Ash-free antioxidants are designed to inhibit oxidation without leaving ash residues upon combustion. Here are key characteristics and functions of ash-free antioxidants:
Characteristics:
1. Chemical Structure:
– Ash-free antioxidants are typically organic compounds with specific chemical structures that enable them to neutralize or inhibit the oxidative degradation of the lubricant.
2. No Ash Formation:
– Unlike some other antioxidant additives that may leave ash residues when the oil is burned, ash-free antioxidants are formulated to minimize or eliminate ash formation during combustion.
Functions and Effects:
1. Oxidation Inhibition:
– The primary function of ash-free antioxidants is to inhibit the oxidation of the lubricating oil. By doing so, they help extend the oil’s service life and maintain its desired performance characteristics.
2.Extended Oil Life:
– Ash-free antioxidants contribute to the extension of the oil’s useful life by preventing the buildup of oxidative by-products that can lead to sludge, varnish, and viscosity increase.
3. Maintained Viscosity:
– By slowing down oxidation, ash-free antioxidants help maintain the viscosity of the oil within the desired range. This is crucial for ensuring proper lubrication and fluidity of the oil over time.
4. Reduced Deposits:
– The use of ash-free antioxidants helps reduce the formation of deposits and sludge in the engine or machinery, promoting cleaner operation and preventing blockages in oil passages.
5. Protection Against Corrosion:
– Inhibiting oxidation also contributes to the protection of metal surfaces against corrosion. Ash-free antioxidants help maintain the integrity of the lubricated components.
6. Improved Equipment Reliability:
– By preventing oxidative degradation, ash-free antioxidants contribute to the reliability and performance of equipment, reducing the likelihood of premature component failure.
Key Benefits of Ash-Free Antioxidants:
- Improved Lubricant Performance: By protecting the lubricant from oxidation and degradation, ash-free antioxidants help maintain its viscosity and other key properties. This translates to better lubrication, reduced friction, and improved engine efficiency.
- Extended Fuel Life: In fuels, ash-free antioxidants prevent degradation and stabilize the fuel against free radicals. This leads to a longer shelf life, improved combustion efficiency, and potentially even reduced emissions.
- Corrosion Protection: Some ash-free antioxidants also offer corrosion protection for metal components within engines and equipment. This further contributes to extended equipment life and reduced maintenance costs.
- Environmentally Friendly: Their lack of ash formation and potential for cleaner emissions make them a preferable choice for sustainable practices in various industries.
Applications of Ash-Free Antioxidants:
Ash-free antioxidants are widely used in various applications, including:
- Automotive lubricants: Engine oils, gear oils, and other automotive lubricants often benefit from the advantages of ash-free antioxidants.
- Industrial lubricants: They find applications in industrial lubricants for machinery, turbines, and other equipment operating in harsh conditions.
In summary, ash-free antioxidants offer a unique combination of performance, environmental benefits, and compatibility with various applications. Understanding their properties and advantages can help you make informed choices regarding lubricants, fuels, and other products where they play a crucial role.








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