| 1948 | Dohkai Chemical Industries Co., Ltd. established as a fully owned subsidiary of Asahi Glass Co., Ltd. for the manufacture and sale of C-type zeolite studied by Asahi Glass |
|---|---|
| 1951 | Began trial production of dried silica gel |
| 1959 | Began manufacture and sales of sodium silicate |
| 1967 | Began manufacture and sales of methyl bromide |
| 1968 | Began manufacture and sales of sodium metasilicate |
| 1985 | Began manufacture and sales of M.S.GEL |
| 1988 | Began manufacture and sales of M.S.GEL ODS products |
| 1990 | Began manufacture and sales of SUNSPHERE |
| 1998 | Began manufacture and sales of SUNLOVELY |
| 1999 | Established the Fine Particle Processing Center |
| 2002 | Established Tokyo Sales Branch (now Tokyo Branch) |
| 2003 | Obtained ISO 9001 certification |
| 2004 | Established the Technical Center |
| 2006 | Changed company name to Asahi Glass SI-Tech Co., Ltd. Obtained ISO 14001 certification |
| 2007 | Company renamed AGC Si-Tech Co., Ltd. |
| 2010 | Obtained OHSAS 18001 certification (relinquished in April 2014) |
| 2014 | Began manufacture of SUNSPERA |
| 2019 | Increased production of SUNSPHERE |
| 2021 | Obtained FSSC 22000 certification |
| 2022 | Launched the shared (integrated) RESIFA silica brand |