Section 721.4390 - Trisubstituted hydroquinone diester(a)Chemical substance and significant new uses subject to reporting.(1) The chemical substance identified generically as trisubstituted hydroquinone diester (PMN No. P-92-329) 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)Hazard communication program. Requirements as specified in § 721.72 (a), (b), (c), (d), (f), (g)(3)(i), (g)(3)(ii), (g)(4)(i), and (g)(5) .(ii)Release to water. Requirements as specified in § 721.90 (a)(4), (b)(4) (where N = 30 ppb).(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), (f), (g), (h), (j), 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 significant new use rule.58 FR 32239, June 8, 1993