| 2015 | move, expand the business in Ansan mtv |
| 2014 | Registered as Specialized environment construction company |
| 2013 | Selected as the INNO-BIZ |
| 2012 | Acquired the certificate of “ISO 9001, 14001” |
| Acquired the patent“Urea solution for the antifreezing and manufacturing method” | |
| Acquired the patent“Harmful gas processing unit” | |
| 2011 | Acquired the patent“Using liquid calcium hydroxide treatment reagent” |
| Selected as the technical venture company | |
| 2010 | Acquired the patent“Incinerator exhaust gas purification system” |
| Designated as R&D institute of SN Co., Ltd | |
| 2009 | Acquired the patent“Incinerator for clinker adherent prevention” |
| Changed company name to SN Co., Ltd | |
| 2005 | Installing the Chemical storing shed |
| 1997 | Established Songwon Chemical Co., Ltd |
