Judgment of the Court (Fourth Chamber) of 9 November 2023.#Chemours Netherlands BV v European Chemicals Agency.#Appeal – Regulation (EC) No 1907/2006 (REACH Regulation) – Article 57(f) – Substances of very high concern – Identification – Conditions – Serious effects on health or the environment – Equivalent level of concern – 2,3,3,3-tetrafluoro-2-(heptafluoropropoxy)propionic acid, its salts and its acyl halides – Identification as a substance fulfilling the criteria for inclusion in Annex XIV to that regulation.#Case C-293/22 P.