Section 721.10586 - Disiloxane, 1,3-dibutyl-1,1,3,3-tetramethyl-(a)Chemical substance and significant new uses subject to reporting.(1) The chemical substance identified as disiloxane, 1,3-dibutyl-1,1,3,3-tetramethyl- (PMN P-11-44; CAS No. 4619-08-3) is subject to reporting under this section for the significant new uses described in paragraph (a)(2) of this section.(2) The significant new uses are: (i)Release to water. Requirements as specified in § 721.90 (a)(4), (b)(4), and (c)(4) (N = 1).(b)Specific requirements. The provisions of subpart A of this part apply to this section except as modified by this paragraph. (1)Recordkeeping. Recordkeeping requirements as specified in § 721.125 (a), (b), (c), and (k) are applicable to manufacturers, importers, and processors of this substance.(2)Limitations or revocation of certain notification requirements. The provisions of § 721.185 apply to this section. 77 FR 61149 , Oct. 5, 2012