1894	Start-up of the first industrial chlor-alkali plant (Elektrolyse I) at Werk I in Bitterfeld by Chemische Fabrik Elektron AG Werk Süd
1895	Start-up of the second "Normalelektrolyse" using Griesheim cells (Elektrolyse II) at Werk Süd (later Chlor I), Start-up of Werk II (later Werk Nord) with Rathenau cells
1900	Start-up of Electrolysis in Zscherndorf (2-3 km west of electrolysis plants Bitterfeld Süd) by Chemische Fabrik Salzbergwerk Neustaßfurt and Co (later Kali Chemie AG)
1902	Start-up of the first Electrolysis in Wolfen with Aussiger Glocken cells
1916	First use of Siemens-Billiter cells in Wolfen
1921	Acquisition of Elektrochemischen Werke Bitterfeld by the Chemische Fabrik Griesheim-Elektron
1925	Foundation of IG Farben, Start-up of the Stoltzenberg Electrolysis in Gräfenhainichen
1931	Shut-down of the last Griesheim cells in Bitterfeld
1933	First mercury cells in Werk Nord, Bitterfeld
1939	First Wellrost cells in the electrolysis Wolfen
1945- 1947	Expropriation of the plants; reorganisation into „Elektrochemisches Kombinat Bitterfeld"; dismantling programme
1950	Start-up Chlor III (Mercury technology) at Werk Süd
1952	Reorganisation into Volkseigenen Betrieb „VEB Elektrochemisches Kombinat Bitterfeld"
1969	Creation of the „VEB Chemiekombinat Bitterfeld"
1981	Start-up of Chlor IV (Diaphragm technology) at the current location of the membrane electrolysis
1990	Creation of the Chemie AG Bitterfeld-Wolfen; shut-down of the electolyses Chlor I and Wolfen
1995	Foundation of the BCA Bitterfelder Chlor-Alkali GmbH
1997	Take-over of the BCA by the ECI Elektro-Chemie GmbH Ibbenbüren, deconstruction of Chlor IV
1998	Start of construction for the new membrane electrolysis at the location of Chlor IV
2000	Start-up of membrane electrolysis, shut-down of Chlor III
2002	Take-over of the 50% share of TUI/Preussag by Akzo Nobel; Integration into Akzo Nobel Base Chemicals

Literature (German):

Vorstand der Chemie AG Bitterfeld-Wolfen (Hrsg.): Bitterfelder Chronik. 100 Jahre Chemiestandort Bitterfeld-Wolfen, Chemie AG Bitterfeld-Wolfen (1993)

Edgar Fischer: Tradition und High-Chem. Eine chlorreiche Geschichte im Raum Bitterfeld Wolfen, ISBN-Nr.: 3-934340-04-0