Rokolub® FR T-46 ultra

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PCC Rokita SA / Phosphorus Chemistry Business Unit
Chemical name
tert-butylphenyl-phenyl phosphate
ISO 14001 ISO 14001 ISO 50001 ISO 50001 ISO 9001 ISO 9001 long service life long service life Not classified according to CLP/GHS Regulation Not classified according to CLP/GHS Regulation ISO 45001 ISO 45001
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Rokolub FR T-46 ultra is an aryl phosphate ester in the form of a colourless to light yellow liquid. It is characterized by the viscosity grade of ISO VG 46.

The product is a synthetic base oil used as a fire resistant hydraulic fluid type HFDR according to ISO 6743-4. Due to the unique fire resistance and self-extinguishing capability Rokolub FR T-46 ultra is a solution dedicated to devices exposed to contact with fire. The use of flame retardant hydraulic oils significantly reduces the risk of fire.

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Properties and applications

Product advantages:

  • unique fire resistance and self-extinguishing ability;
  • resistance to high temperatures;
  • very good lubricating properties;
  • good hydrolytic and oxidation stability;
  • cleanliness;
  • high air release value;
  • not classified as a hazard to human health;

Benefits of using the product:

  • reducing the risk of fire;
  • possibility of use in conditions of high ambient temperature and near open fire;
  • effective operation of the device;
  • safety of people operating hydraulic devices;


  • power generation industry: hydraulic fluids for control systems in steam turbines, lubricating oils for gas and steam turbines;

Markets and applications
Lubricants and metalworking fluids, base oils, additives / Hydraulic fluids, Turbine oils

Sythetic base stock


Specialty Products / Lubricants & functional fluids

Alternative names
tert-butylphenyl-phenyl phosphate, TBPP, phenol isobutylenated phosphate, phenol, isobutylenated, phosphate (3:1), reaction mass of 4-tert-butylphenyl diphenyl phosphate and bis(4-tert-butylphenyl) phenyl phosphate, tert-butylphenyl diphenyl phosphate [CAS#56803-37-3, EC: 260-391-0], butylated phenol phosphate ester, butylated phenyl phosphate, t-butylphenyl phenyl phosphate, TPP butylated, synthetic triaryl phosphates based on butylated phenol, phosphate ester, aryl phosphate ester, triaryl phosphate ester, tertiary phosphate esters, triphenyl phospate ester, neutral phosphate ester, synthetic phosphate ester, organophosphate ester, organophosphorus compound, phosphorous chemicals, esters of phosphoric acid
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