Section 721.2535 - Benzene, 1,1'-methylanebis[4-isocyanato-, homopolymer, Bu alc.-blocked(a)Chemical substance and significant new uses subject to reporting.(1) The chemical substance identified as benzene, 1,1'-methylanebis[4-isocyanato-, homopolymer, Bu alc.-blocked (PMN P-95-1386; CAS No. 186321-98-2) 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)Industrial, commercial, and consumer activities. Requirements as specified in § 721.80(y)(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 (i) 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.63 FR 3425, Jan. 22, 1998