HISTORY

• KOREA OTSUKA CO., LTD.

  1988.11.02 Creation of Korea Otsuka Co., Ltd.

  1989.05.15 Start operation head office factoy (H.H 7,000ton/year)

  1990.12.01 Start producing NaOH, L-CL2

  1991.02.15 Start producing 80% HH(Hydrazine hydrate)

  1991.02.20 The completion of a factory

• KUMYANG
  OTSUKA CHEMICAL CO., LTD.

  1994.03.18 Change the company name
  (Kumyang Otsuka chemical Co., Ltd.)

  1998.08.31 Complete the extension construction
  (80%H.H 10,000ton/year)

  2000.03.15 Start producing 100% H.H

• KOC CO., LTD.

  2003.03.20 Change the company name
  (KOC Co., Ltd.)

  2004.03.02 Acquire ISO9001

  2006.09.01 Start purchasing steam

  2006.11.24 Start selling hydrogen

  2013.03.15 Complete the construction of
  MVR(Steam recycling) facility

  2015.10.13 Completion of derivative plant

  2021.08.26 Completion of derivative 2line plant