1987. Jun. : Founded HANVIT Chemical Co., Ltd.
1989. Nov. : Completed Osan Factory in Osan City, Kyonggi-do.
1989. Apr. : Produced Oxalic Acid (O.A) and Surfactants.

1990. Apr. : Changed C.E.O. (E.U.Chung) & Share- holder of the Company
1991. Feb. : Made O.E.M Product Contract with 'OXY Co., Ltd. for Liquid cleansers and other household items.
1991. Jun. : Exported O.A first time in Korea to Japan
1991. Jun. : Produced Methyl / Propyl Paraben and sell to Cosmetic Companies in Korea.
1993. May. : Developed and Produced Toilet Bowl Cleaner (T.B.C) / Drop type - First time in Korea - and registered its brand "Chung Blue"
1993. Jun. : Opened Seoul office.
1997. May. : Made O.E.M Production Contract with Amore Pacific Corp. to produce T.B.C. named "Chong Chong" (OXY Co., Ltd. took over the Contract in 1998)

2000. Oct. : Completed the Pyong-taek factory in Pyong-taek and moved Osan factory.
2000. Dec. : Made O.E.M Production Contract with Korea Johnson. to produce 'Painsol'.
2002. Feb. : Acquired of ISO 9001 : 2000 / KSA 9001
2002. Nob. : Awarded USD 1 million Export Medal from the Ministry of Commerce, Industry and Energy.
2003. Jun. : Made O.E.M. Product Contract with Korea/ Jhonson Co., Ltd. for Air freshener named 'Aroma Liquid'
2005. Jun. : Made Private Brand manufacturing contract for Toilet Bowl Cleaner (named 'Wiselect') with Lotte Mart.
2006. Dec. : Completed Eum-seong Factory in Chung-cheong-buk-do and moved Pyong-taek factory.
2008. Nov. : Acquired ISO14001