Section 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.(2) The significant new use is: Any use.(b)Specific requirements. The provisions of subpart A of this part apply to this section except as modified by the following paragraphs: (1)Persons who must report. Section 721.5 applies to this section except for § 721.5(a)(2) . A person who intends to manufacture, import, or process for commercial purposes the substance identified in paragraph (a)(1) of this section and intends to distribute the substance in commerce must submit a significant new use notice.(2)Exemptions. Section 721.45 applies to this section except for § 721.45(f) . A person who intends to import or process the substance identified in paragraph (a)(1) of this section as part of an article is subject to the notification provisions of § 721.25 .56 FR 56472, Nov. 5, 1991. Redesignated at 58 FR 29946, May 24, 1993, as amended at 58 FR 34204, June 23, 1993