Section 721.11463 - Butanoic acid, 4-(dimethylamino)-, ethyl ester(a)Chemical substance and significant new uses subject to reporting.(1) The chemical substance identified as butanoic acid, 4-(dimethylamino)-, ethyl ester (PMN P-18-59; CAS No. 22041-23-2) 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)Protection in the workplace. Requirements as specified in § 721.63(a)(4) and (5), (a)(6)(v), (b), and (c) . When determining which persons are reasonably likely to be exposed as required for § 721.63(a)(4) , engineering control measures (e.g., enclosure or confinement of the operation, general and local ventilation) or administrative control measures (e.g., workplace policies and procedures) shall be considered and implemented to prevent exposure, where feasible. For purposes of § 721.63(a)(5) respirators must provide a National Institute for Occupational Safety and Health assigned protection factor of at least 1,000. For purposes of § 721.63(b) concentration set at 1.0%.(ii)Industrial, commercial, and consumer activities. Requirements as specified in § 721.80(g) .(b)Specific requirements. The provisions of subpart A of this part apply to this section except as modified by this paragraph (b). (1)Recordkeeping. Recordkeeping requirements as specified in § 721.125(a) through (d) and (i) are applicable to manufacturers and processors of this substance.(2)Limitations or revocation of certain notification requirements. The provisions of § 721.185 apply to this section. 86 FR 15100 , Mar. 22, 2021