Nonylated Diphenylamine
Nonylated diphenylamine (NDPA) — a nonyl-substituted diphenylamine aminic antioxidant delivering excellent high-temperature oxidation protection with good oil solubility.
The nonyl-substituted aminic antioxidant
Nonylated diphenylamine substitutes nonyl groups onto the diphenylamine, giving excellent high-temperature antioxidancy with good oil solubility and handling.
Nonylated diphenylamine (NDPA) is an aminic antioxidant in which nonyl groups are substituted onto the diphenylamine structure. Like other aminic antioxidants, it excels at high-temperature oxidation protection, while the nonyl substitution gives good oil solubility and handling. It is used in engine oils, turbine oils, industrial oils and greases where high-temperature oxidation resistance is needed, and is frequently combined with phenolic antioxidants for broad-temperature coverage. It is ashless and part of the antioxidant & anticorrosion range, complementing alkylated diphenylamine in the aminic antioxidant family.
Nonylated Diphenylamine — typical properties
Representative typical values for nonylated diphenylamine. Indicative only — exact values vary by grade and are confirmed on the TDS and batch COA.
| Property | Typical Value | Method / Note |
|---|---|---|
| Appearance | Amber to dark liquid | Visual |
| Nitrogen content | Present (amine) | Aminic structure |
| Kinematic viscosity (100°C) | ~10–40 mm²/s | ASTM D445 |
| Flash point (COC) | > ~180 °C | ASTM D92 |
| Density (20°C) | ~0.95–1.05 g/cm³ | Typical |
| Ash | Ashless | No metal |
| Type | Primary (radical scavenger) | Aminic, high-temp |
Typical values for guidance only — not a specification. Request the TDS for the specific grade you need; the COA reports actual measured values for your batch.
Where nonylated diphenylamine antioxidant is used
Engine Oils
High-temperature oxidation protection with good solubility. See engine oil additives.
Turbine Oils
Long-life high-temperature antioxidancy for turbine oils. See industrial & marine.
Industrial Oils
Oxidation resistance for high-temperature industrial lubricants.
Grease
High-temperature antioxidant for grease in hot bearings. See grease additives.
Why formulators choose nonylated diphenylamine antioxidant
Excellent high-temp protection
Aminic antioxidant performance for hot-running oils and greases.
Good solubility & handling
Nonyl substitution gives good oil solubility and easy handling.
Pairs with phenolics
Combines with phenolic antioxidants for broad-temperature oxidation protection.
From sample drum to ISO tank
Sinolook supplies nonylated diphenylamine antioxidant at any scale, from formulation samples to commercial bulk, to over 60 countries.
Other antioxidant & anticorrosion additives
Explore the rest of the antioxidant & anticorrosion additive range:
Frequently asked questions
What is nonylated diphenylamine (NDPA) used for?
How does NDPA differ from alkylated diphenylamine (ADPA)?
Why use an aminic antioxidant like NDPA?
Is NDPA suitable for turbine oils?
Can Sinolook provide TDS, MSDS and COA?
Request nonylated diphenylamine antioxidant from Sinolook
Tell us your target grade, application and volume — we'll send the TDS, a batch COA and a delivered quotation within 24 hours.
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