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Zinc Dialkyl Dithiophosphate (ZDDP)

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Zinc Dialkyl Dithiophosphate (ZDDP) is a zinc dialkyldithiophosphate lubricating oil additive of exceptionally high thermal and hydrolytic stability. It is generally used with detergent, dispersant and acid neutralizing additives in engine oils. This additive provides oxidation, copper-lead bearing corrosion and wear control in diesel and gasoline engines. It is particularly effective under the severe temperature and load conditions encountered in highly supercharged diesel engines.

Zinc Dialkyl Dithiophosphate (ZDDP)

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Handling & Storage

When handling this product a maximum temperature of 60°C should be observed for storage, unloading and blending. However, it is strongly recommended that for long term storage the temperature should not exceed 50°C.It is recommended that it be stored in dry, clean and ventilated environment Consult material safety data sheet (MSDS) for additional handling information.

Zinc Dialkyl Dithiophosphate (ZDDP)


Recommended at
By weight 0.7% - 2.05%
By volume 0.58% - 1.69%

In suitable base stocks to provide oil inhibition, bearing corrosion protection, and anti-wear properties to crankcase oils.


220 kg drums


  • Engine oil additive R & O oils
  • Hydraulic fluids Turbine oils
  • Gear oils Compressor oils Greases

Specification Sheet

Appearance Visual Yellow Clear Liquid Yellow Clear Liquid
Specific Gravity @ 15.6°C ASTM D 1298 1.11 1.18 1.15
Colour, Dilute ASTM D 1500 1.0 3.0 1.5
Viscosity @ 100°C, cSt. ASTM D 445 8.0 18.0 10
Flash Point, °C (PMCC) ASTM D 93 121.0 165
Water Content, % wt. ASTM D 95 0.2 Nil
Phosphorus Content, mass % ASTM D 5185 9.0 9.7 9.3
Sulfur Content, mass % ASTM D 4951 18.0 21.0 19.5
Zinc Content, mass % ASTM D 5185 9.8 11.0 10.4

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