TPS®32 is an active pentasulfide sulfur donor additive (32% sulfur) showing excellent extreme pressure performances & compatibility with mineral, synthetic base oils and greases.


Key properties: almost colorless & odorless, limpid, free of unsatured hydrocarbon residues & compatible with a large range of formulations.


CAS number
Chemical name
Polysulfides di-tert-dodecyl
Common name


TPS®32 exhibits a high active sulfur content readily available even at low temperatures, which in addition to its excellent chemical stability, makes it particularly suitable for highly demanding applications with steel. TPS®32 shows lighter color and lower odor than sulfurized olefins.

  • Density (20°C = 68°F): 101 kg/m3
  • Viscosity (20°C): 603 mPa.s
  • Viscosity (50°C): 64 mPa.s
  • Pour point ≤ -20°C
  • Vapor pressure (20°C) ≤ 0.03 hPa
  • Refraction index n20/D: 1.547
  • Specific heat at 20°C: 0.42 kcal/kg/°C
  • Active sulfur at 150°C (ASTM D-1662): 23%

TPS®32 is totally soluble in most hydrocarbonated solvents such as toluene, white spirits and  fuels. It is fully compatible with mineral and vegetable oils. It is slightly soluble in light alcohols and is not soluble in water.

Geographic availability



  • Automotive and transportation
    • Gear oils
  • General industry
    • Greases
    • Metal working fluids
    • Slideway oils

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