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OCI provides TDI, which is used around the world in foam type products such as the components of vehicles, beds, paints, and adhesives.

Product Features




TDI is a basic material of Polyurethane (PU) that is widely used in industrial fields and daily living such as the components of vehicles, shoes, furniture, and beds as well as paints and adhesives.

Production Process

TDI is manufactured by reacting the Toluenediamine (TDA) generated by hydrogenation of Dinitrotoluene (DNT) with phosgene (COCl2).

OCI Status

Gunsan plant

Gunsan Plant

OCI started TDI business in 1990 with an annual capacity of 25,000MT at its Gunsan plant. In 2004, the company is supplying TDI to major domestic companies as well as overseas, including China, Turkey, and Southeast Asia, with an annual capacity of 50,000MT

Business Commencement


Production Plant Status

- Gunsan Plant (Capa : 50,000MT/yr)

Major Markets

China, Turkey, Southeast Asia, Korea, etc.

Key Point

  • Major Domestic TDI Production Company

    Major domestic TDI producer that stably provides products and maintains close relationships with demanders at home and abroad.

  • Production Know-How

    Experience and technology accumulated over 30 years.


  • Product Name : Toluene Di-Isocyanate (TDI)
  • Chemical Formula : CH3C6H3(NCO)2
  • Certification : ISO 9001, ISO 14001, KOSHA 18001, OHSAS 18001, KGS 18001
  • Tel :
    • - (Export) : +82-2-727-9495 /
    •                    +82-2-727-9469 /
    • - (Domestic) : +82-2-727-9413 /
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