The Industrial Union of Chemicals, Glass and Ceramics (German: Industriegewerkschaft Chemie, Glas und Keramik, IG CGK) was a trade union representing workers in various industries in East Germany.
In 1955, its members in the building materials sector were transferred to the Industrial Union of Construction and Wood, and in 1956 various members moved to the Industrial Union of the Local Economy, although they returned in 1958.
The union became involved in sports associations, their names starting with "SV Chemie".
In addition to these areas, it also represented workers in the paper and petroleum industries, and in waste disposal.
It began working closely with the Chemical, Paper and Ceramic Union, and gradually merged into it, completing the process in June 1991.