TPS®44 is an inactive trisulfide sulfur donor additive (44% sulfur) showing excellent extreme-pressure and anti-wear properties, almost non-corrosive to copper & compatibility with mineral, synthetic base oils and greases.


Key properties: almost colorless, limpid, free of unsatured hydrocarbon residues and compatible with a large range of closed-system formulations.


CAS number
Chemical name
Polysulfides, di-tert-Bu
Common name


The low viscosity and high sulfur content of TPS®44 makes it the best choice for long lasting gear oil formulations and closed system use.


  • Density (20°C = 68°F): 101 kg/m3
  • Viscosity (20°C): 4 mPa.s
  • Pour point ≤ 10 °C
  • Melting point ≤ 3°C
  • Boiling point: 178 °C
  • Vapor pressure (20°C) < 0,1 hPa


TPS®44 is totally soluble in most common hydrocarbon solvents such as toluene, white spirit, fuels. It is fully compatible with mineral and vegetable oils. It is slightly soluble in light alcohols but not soluble in water. 

Geographic availability



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

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