Primary C8 ZDDP
Primary C8 ZDDP — a primary octyl (2-ethylhexyl) ZDDP combining excellent thermal stability with strong anti-wear and antioxidant performance. A premium ZDDP for demanding high-temperature oils.
The premium thermally stable primary ZDDP
Built from primary octyl (2-ethylhexyl) alcohol, primary C8 ZDDP offers excellent thermal stability with strong anti-wear and antioxidant performance — a premium choice for demanding oils.
Primary C8 ZDDP is a primary octyl (2-ethylhexyl) zinc dialkyldithiophosphate prized for its excellent thermal stability. The C8 primary structure resists thermal decomposition well, maintaining anti-wear and antioxidant protection at high temperatures over long drain intervals. This makes it a premium ZDDP for demanding engine oils, high-temperature industrial oils and applications where thermal durability is paramount. Like all ZDDP it delivers the three core functions — anti-wear, antioxidant and anti-corrosion — and is part of the antioxidant & anticorrosion range.
Primary C8 ZDDP — typical properties
Representative typical values for primary C8 ZDDP. Indicative only — exact values vary by grade and are confirmed on the TDS and batch COA.
| Property | Typical Value | Method / Note |
|---|---|---|
| Appearance | Light yellow to amber liquid | Visual |
| Zinc content | ~9–11 wt% | Grade-dependent |
| Phosphorus content | ~7.5–9.5 wt% | Grade-dependent |
| Sulphur content | ~15–18 wt% | Grade-dependent |
| Kinematic viscosity (100°C) | ~5–12 mm²/s | ASTM D445 |
| Flash point (COC) | > ~180 °C | ASTM D92 |
| Thermal stability | Excellent (C8 primary) | Premium grade |
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 primary C8 ZDDP is used
Demanding Engine Oils
Thermally durable anti-wear and antioxidant protection for long-drain oils. See engine oil additives.
High-Temperature Industrial Oils
Maintains protection at elevated temperatures over extended service.
Hydraulic Oils
Premium zinc anti-wear for demanding hydraulic systems. See hydraulic oil.
Long-Drain Applications
Excellent thermal stability supports extended drain intervals.
Why formulators choose primary C8 ZDDP
Excellent thermal stability
C8 primary structure resists thermal decomposition for high-temperature durability.
Strong anti-wear & antioxidant
Premium ZDDP performance across the three core functions.
Long-drain durability
Maintains protection over extended drain intervals in demanding service.
From sample drum to ISO tank
Sinolook supplies primary C8 ZDDP 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 primary C8 ZDDP used for?
Why is C8 primary ZDDP more thermally stable?
When should I choose C8 primary over standard primary ZDDP?
Does C8 ZDDP work in hydraulic oils?
Can Sinolook provide TDS, MSDS and COA?
Request primary C8 ZDDP 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.
Request a Quote