Our History
YONGSAN CHEMICALS has produced maleic
anhydride and its derivatives since our foundation in 1973.
We have made the utmost efforts to meet the needs of our
customers by continuously improving our process and system.
2010s
Launched Dimethylaminoethyl Acrylate2012
Methylchloride Quaternary Salt (DAQ)              
2000s
2007Expanded production lines for
Tetrahydrophthalic Anhydride
2005Won USD 30 million Export Prize
2002Acquired Korea PTG Co., Ltd.
2000Established Yongsan Mitsui Chemicals, Inc.
1990s
Won USD 10 million Export Prize1999
Acquired ISO 9001 certificate1999
Changed the company name to1997
Yongsan Chemicals, Inc.              
Started commercial 1993
production of DL-Malic Acid                
1980s
1989Expanded maleic anhydride
production facilities
1984Started to produce fumaric acid
1970s
Started commercial production of1975
maleic anhydride              
Founded Daenong Petrochemical Co., Ltd1973