The Combined Nomenclature (CN), v1:2018
2520: Gypsum; anhydrite; plasters consisting of calcined gypsum or calcium sulphate, whether or not coloured, with or without small quantities of accelerators or retarders
https://www.dst.dk/en/Statistik/dokumentation/nomenklaturer/kn?id=bdccfab4-a71c-4f32-8b96-d3d9ed56013c