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§ 721.2800 Erionite fiber.
(a) Chemical substance and significant new use subject to reporting. (1) The chemical substance, erionite fiber (CAS No. 66733-21-9 (when an exact molecular formula is known) and 12510-42-8 (when an exact molecular formula is not known)), is subject to reporting under this section for the significant new use described in paragraph (a)(2) of this section.