Section 721.4180 - Hexamethylphosphoramide(a)Chemical substance and significant new uses subject to reporting.(1) The chemical substance hexamethylphosphomide, CAS Number 680-31-9, is subject to reporting under this section for the significant new uses described in paragraph (a)(2) of this section.(2) The significant new use is: Any use.(b)Special provisions. The provisions of subpart A of the part apply to this section except as modified by this paragraph. (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 signficant new use notice.51 FR 9453, Mar. 19, 1986. Redesignated at 53 FR 2845, Feb. 2, 1988. Further redesignated at 58 FR 29946, May 24, 1993, as amended at 58 FR 34204, June 23, 1993