Section 721.4100 - Tris(disubstituted alkyl) heterocycle(a)Chemical substance and significant new uses subject to reporting.(1) The chemical substance identified generically as tris(disubstituted alkyl) heterocycle (P-90-142) 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), (a)(5)(iv), (a)(6)(i), (b) (concentration set at 0.1 percent) and (c).(ii)Hazard communication program. Requirements as specified in § 721.72 (a), (b), (c), (d), (e) (concentration set at 0.1 percent), (f), (g)(1)(iv), (g)(1)(vi), (g)(1)(vii), (g)(2)(iv), (g)(5). The hazard communication requirements do not apply when the chemical substance is present in a plastic, an elastomer, a rubber matrix, or in a solution.(iii)Industrial, commercial, and consumer activities. Requirements as specified in § 721.80(q) . Any amount of the PMN substance imported in a plastic, an elastomer, a rubber matrix, or in a solution, such that inhalation is precluded, shall not be included in the production limit calculations.(b)Specific requirements. The provisions of subpart A of this part apply to this section except as modified by this paragraph.(1)Recordkeeping. The following recordkeeping requirements are applicable to manufacturers, importers, and processors of this substance, as specified in § 721.125 (a), (b), (c), (d), (f), (g), (h), and (i) .(2)Limitations or revocation of certain notification requirements. The provisions of § 721.185 apply to this significant new use rule.(3)Determining whether a specific use is subject to this section. The provisions of § 721.1725(b)(1) apply to this section.56 FR 40212, Aug. 13, 1991. Redesignated and amended at 58 FR 29946, May 24, 1993; 58 FR 34204, June 23, 1993