Rokolub® AD 232

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PCC Rokita SA / Phosphorus Chemistry Business Unit
Chemical name
tert-butylphenyl-phenyl phosphate
ADR ADR ashless ashless ISO 14001 ISO 14001 ISO 50001 ISO 50001 ISO 9001 ISO 9001 low treat rate low treat rate ISO 45001 ISO 45001 Solvent-free production Solvent-free production
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Rokolub AD 232 is an aryl ester of phosphoric acid (V) in the form of a light yellow to colourless liquid with a characteristic, delicate fragrance. In the presence of water and an acidic or alkaline environment, a hydrolysis reaction occurs, which is typical for this group of chemical compounds. In order to ensure hydrolytic stability, the product has a very low water level and a low acid value which limits its hydrolysis. Rokolub AD 232 also has a high content of phosphorus, which is responsible for the unique properties of the product.

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Properties and applications

Advantages of Rokolub AD 232:

  • improves the anti-wear properties of mineral and synthetic oils
  • interacts with other anti-seizing additives (phosphorus, sulphur, chlorine), which allows to obtain a good surface protection in sliding contact
  • unlike the widely used sulphated and chlorinated additives AW/EP, it does not cause corrosion or metal colouring
  • is compatible with a wide range of oil additives
  • it is safe for human health

Benefits of using the product:

  • obtaining oils with better anti-wear and anti-seizing properties, and extending the service life of the equipment
  • reduction of rust compared to oils containing commonly used additives AW/EP based on sulphur or chlorine
  • possible to be used in a package with other oil additives
  • increased safety during production and use of oils


  • industrial oils: hydraulic oils, compressor oils, turbine oils, gear oils
  • industrial greases
  • metal wroking fluids

Markets and applications
Lubricants and metalworking fluids, base oils, additives / Compressor oils, Greases, Hydraulic fluids, Industrial gears, Metalworking fluids, Turbine oils

Antiwear Additives


Specialty Products / Lubricants & functional fluids

Alternative names
tert-butylphenyl-phenyl phosphate, TBPP, p-tert-butylphenyl-di-phenyl phosphate and bis (p-tert-butylphenyl) phenyl phosphate reaction mass, phosphate esters, phosphate esters, organophosphate esters, phosphate aryl esters, phosphate aryl esters, organophosphates, phosphoric acid esters, phosphoric acid organic esters, phosphoric acid organic esters, phosphorus derivatives
Manufacturer: PCC Rokita SA

PCC Rokita SA is one of the largest chemical companies in Poland as well as Central and Eastern Europe. Its activity includes the production of chloroalkali, polyether polyols, polyalkylene glycols and phosphorus derivatives.

PCC Group
The product was developed as part of a research and development project co-funded by the European Union, from the European Regional Development Fund.

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