Propylene Tetramer (PTM)

Propylene tetramer (PTM), also known as dodecene, is a branched C12 olefin, produced by oligomerisation of propylene. Propylene tetramer is the preferred name as this distinguishes it from other C12 molecules such as 1-dodecene, the linear alpha-olefin derived from ethylene.

Janex offers various “cuts” of propylene tetramer from a broad cut with around 60% C12 content, to a narrow cut with over 90% C12. 

It is generally supplied either in parcel tankers or in iso-tanks.

Propylene Tetramer CAS 93821-12-6 / EC 6842-15-5



Propylene is oligomerised by catalytic olefin condensation to produce a higher olefin liquid mixture called polygas which is then separated by distillation.

Several acid catalysts can be used including solid phosphoric acid (SPA) and zeolites.

Main Applications:

  • Branched dodecylbenzene (also known as BAB or branched alkylbenzene)
  • C12 isoparaffin
  • Dodecyl diphenyloxide sulfonate (surfactant for latex, rubber & textiles)
  • Dodecylphenol (DDP)
  • Iso-tridecanol
  • Neotridecanoic acid
  • Tert-dodecylamine
  • Tert-dodecyl mercaptan (TDM)
  • Tetrapropylene succinic anhydride or acid (anti-rust agent, curing agent for epoxy resin and intermediate)


Contact us for more information.