CFR›Title 40›Chapter I›Part 721›Subpart E›40 CFR 721.12260-721.12278 Citation40 CFR 721.12260-721.12278CorpusDaily eCFRDisplayed edition2026-10-28Last updated2026-10-28 §§ 721.12260-721.12278 xxxLink to an amendment published at 91 FR 65465, Oct. 15, 2026. Previous 721.12229 § 721.12229 Multi-walled carbon nanotubes.