Section 721.1920 - 1,4-Bis(3-hydroxy-4-benzoylphenoxy)butane(a)Chemical substance and significant new uses subject to reporting.(1) The chemical substance identified as 1,4-bis(3-hydroxy-4-benzoylphenoxy)butane (PMN P-93-483) 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) (where N = 1 ppb).(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.58 FR 51683, Oct. 4, 1993