Section 721.10541 - 5,2,6-(Iminomethenimino)-1H-imidazo[4,5-b] pyrazine, octahydro-1,3,4,7,8,10-hexanitro-(a)Chemical substance and significant new uses subject to reporting.(1) The chemical substance identified as 5,2,6-(iminomethenimino)-1H-imidazo[4,5-b]pyrazine, octahydro-1,3,4,7,8,10-hexanitro- (PMN P-03-481; CAS No. 135285-90-4) 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)(3), (a)(4), (b) (concentration set at 0.1 percent), and (c). The following respirator meets the requirements of § 721.63(a)(4) : a National Institute for Occupational Safety and Health (NIOSH)-certified air purifying respirator with a particulate P100 vapor cartridge or canister.(ii)Release to water. Requirements as specified in § 721.90 (a)(2)(v), (b)(2)(v), and (c)(2)(v) .(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), 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 61140 , Oct. 5, 2012