What regulatory guidelines apply to terbium (CAS: 7440-27-9)?

Terbium (CAS: 7440-27-9) falls under the GHS (Global Harmonized System of Classification and Labeling of Chemicals) and is regulated under REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) in the European Union. In the United States, it is also subject to FDA and EPA requirements for handling and disposal. Proper labeling, storage, and safe transportation practices must be followed to comply with these regulations.