| March 23, 1920 |
Foundation Meeting of the "Czechoslovak Joint-stock Company for Explosive Materials" in Semtín |
| May 6, 1920 |
Approval of preliminary conception plan of a new factory serving as the documentation for selection of suitable locality |
| December 23, 1920 |
Licence Charter issued granting authorization for monopoly production of explosive materials |
| December 1920 |
Purchase of land in Semtín at Pardubice |
| 1921 |
Commencement of building of Departments L (production of black powder) and C (production of explosives) |
| 1922 |
Production of black powder and industrial explosives started |
| 1923 |
Building of Departments A (nitroglycerine), F (production of acids), E (nitrocellulose) and H (trinitrotoluene) completed |
| 1924 |
Production started in department B (smokeless powders) |
| 1928 |
Building started of affiliated plant Synthesia - production of inorganic compounds inevitable for production of explosives |
| 1934 |
The company renamed Explosia a.s. |
| 1946 |
Rise of SYNTHESIA n.p. (national enterprise) - by merging Explosia a.s. and Synthesia |
| 1948 |
Rise of East Bohemian Chemical Works (VCHZ) n.p. |
| 1954 |
Establishing of the "Research Institute of Industrial Chemistry" (VÚPCH) |
| 1990 |
The use of name Explosia for the "Plant 05 - Special Production" of VCHZ n.p. renewed |
| 1998 |
Explosia a.s. established, subsidiary company of Synthesia a.s. |
| 1999 |
Rise of "Business Unit Explosia" by merging VÚPCH and Plant 05-Explosia |
| January 23rd, 2002 |
Government Decree No. 89/2002 on change of Business Unit Explosia ownership structure - assignment of state proprietary rights |
| May 30th, 2002 |
Property deposit of Business Unit Explosia into Explosia a.s. |
| June 1st, 2002 |
Commencement of production and commercial activity of Explosia a.s., as Aliachem a.s. subsidiary
|