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1969. 09 Established as a joint venture between Korea’s Chungju Fertilizer Co. and US’s Skelly Oil Co.
1970. 02 Hanil Synthetic Fiber acquired 15% of the shares owned by Chungju Fertilizer
1972. 10 Started operation of No.1 AN Plant
1973. 10 Hanil Synthetic Fiber acquired 50% of the shares owned by Chungju Fertilizer
1974. 03 Japan’s Asahi Kasei acquired 25% of the shares owned by US’s Skelly Oil Co.
1975. 12 Japan’s Asahi Kasei became a shareholder owning 50% of company shares by acquiring the remaining 25% of the shares owned by US’s Skelly Oil Co.
1978. 11 Started operation of No.2 AN Plant
1985. 08 Started operation of No.1 Sodium Cyanide Plant
1988. 09 Started operation of No.2 Sodium Cyanide Plant
1993. 11 Completed the capacity expansion project for No. 2 Sodium Cyanide Plant (12,000→18,000 tons)
1995. 12 Started operation of the acrylamide Plant and EDTA Plant
1996. 05 Obtained ISO9001 certification from LRQA UK
1996. 07 Completed the capacity expansion project for No. 1 and 2 AN Plant (20,000 tons)
1998. 05 Japan’s Asahi Kasei becoming a major shareholder owning 100% of company shares by acquiring 50% of those owned by Hanil Synthetic Fiber Corp.

2003. 04 Started operation of No. 3 AN Plant (200,000 tons) and No. 3 Sodium Cyanide Plant (15,000 tons)
2008. 02 We succeeded in verifying the operation of the world’s first propane-process acrylonitrile developed by Asahi Kasei
2011. 06 Started construction of No. 4 AN Plant and No. 4 Sodium Cyanide Plant
2012. 12 Started operation of No. 4 AN Plant (245,000 tons) and No. 4 Sodium Cyanide Plant (28,000 tons)
2013. 12 Started operation of C.G Aceto Plant (11,000 tons)