Section 721.10158 - 2-Pentanone, 3,5-dichloro-(a)Chemical substance and significant new uses subject to reporting.(1) The chemical substance identified as 2-pentanone, 3,5-dichloro- (PMN P-06-16; CAS No. 58371-98-5) 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)(1), (a)(2)(i), (a)(2)(ii), (a)(3), (a)(4), (a)(5), (a)(6), (b) (concentration set at 1.0%), and (c). Respirators must provide a National Institute for Occupational Safety and Health (NIOSH) assigned protection factor (APF) of at least 50. The following NIOSH-approved respirator with an APF of 50 meets the minimum requirements for § 721.63(a)(4) : NIOSH-approved air-purifying, tight-fitting full facepiece respirator equipped with combination organic gas/vapor P100 cartridges (organic vapor, acid gas, or substance-specific).(ii)Hazard communication program. Requirements as specified in § 721.72 (a), (b), (c), (d), (e) (concentration set at 1.0%), (f), (g)(1)(i), (g)(1)(ii), (g)(1)(iii), (g)(1)(iv), (g)(1)(viii), (g)(1)(ix), (g)(2)(i), (g)(2)(ii), (g)(2)(iii), (g)(2)(iv), (g)(2)(v), (g)(3)(i), (g)(3)(ii), (g)(4) (resulting in receiving stream levels exceeding 0.1 parts per billion (ppb)), and (g)(5).(iii)Release to water. Requirements as specified in § 721.90 (a)(4), (b)(4), and (c)(4) (N = 0.1).(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), (d), (e), (f), (g), (h), 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. 74 FR 47886 , Sept. 18, 2009