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Liquid dimethyl terephthalate (liquid DMT)
CAS no. 120-61-6


Dimethyl terephthalate, DMT in short, is a precursor obtained from p-xylol, methanol and air under the influence of a catalyst.

DMT as an abbreviation stands for the product dimethyl terephthalate, a precursor to the manufacturing of polyester fibres. In this area, a distinction is made between PET (polyethylene terephthalate) and PBT (polybutylene terephthalate). Both polyesters are technical thermoplastic resins found in a large variety of industrial and consumer goods. DMT is manufactured using the company's own technique, which was developed in the 1950s at the Witten plant of Dynamit-Nobel AG as it was known then.

Licence systems on all continents now work with this Steyerberg technique.

The most important basic material for the manufacturing process is para-xylol, which is obtained from crude oil. The para-xylol is oxidised with air at high temperatures in reactors, esterified with methanol, another alcohol originating from crude oil, separated in distillation columns, and the resulting crude DMT cleaned using recrystallisation. The finished product accumulates in liquid form. It is filled at around 160° Celsius and transported at this temperature in special tankers with suitable isolation and heating equipment to customers across Europe for use in the following areas:


Technical resins
PBT, PBT copolymers Injection and extrusion moulding materials
  • Telecommunications
  • Automotive sector
  • Consumer goods industry
  • Electrical industry
    Copolyesters for
  • Varnish
  • Adhesive raw materials
  • Biodegradable films


  • Films
    PET
  • Food packaging
  • Bottles
  • Packaging film for consumer goods, coloured light protection film, electrical insulation film, anchor nut insulation film, test strip film in the pharmaceutical industry, thin films for wound capacitors
  • Material in stents
  • Capacitors
  • Cable insulation
  • Polyester resins used in the manufacturing of films, varnishes and adhesives
  • Photovoltaic applications
  • LCD screens


  • Fibres
    PET
    Technical fibres
  • Seat covers
  • Tyre cord
  • Jackets in the engine compartment
  • Rope


  • Textile and carpet fibres
  • Tarpaulins
  • Lorry tarpaulins
  • Building tarpaulins
  • Advertising tarpaulins