# 721.11873 Metalloxanes, alkyl, alkyl group-terminated, reaction products with dihalo-dialkylalkylaryl-alkyl-polycyclic-ylidene(dialkylsilylene)-dialkylalkylaryl-alkylalkyl-polycyclic-ylidene, metal oxide and nonmetallic oxide (generic).
(a) *Chemical substance and significant new uses subject to reporting.* (1) The chemical substance identified generically as metalloxanes, alkyl, alkyl group-terminated, reaction products with dihalo-dialkylalkylaryl-alkyl-polycyclic-ylidene(dialkylsilylene)-dialkylalkylaryl-alkylalkyl-polycyclic-ylidene, metal oxide and nonmetallic oxide (PMN P-21-68) 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) and (3) and (c). When determining which persons are reasonably likely to be exposed as required for § 721.63(a)(1), engineering control measures (*e.g.,* enclosure or confinement of the operation, general and local ventilation) or administrative control measures (*e.g.,* workplace policies and procedures) shall be considered and implemented to prevent exposure, where feasible.
(ii) *Hazard communication.* Requirements as specified in § 721.72(a) through (d), (f), and (g)(1) and (5). For purposes of § 721.72(g)(1), this substance may cause: acute toxicity; skin corrosion; skin irritation; serious eye damage; eye irritation; respiratory sensitization; skin sensitization; germ cell mutagenicity; reproductive toxicity; specific target organ toxicity. Alternative hazard and warning statements that meet the criteria of the Globally Harmonized System and OSHA Hazard Communication Standard may be used.
(iii) *Industrial, commercial, and consumer activities.* Requirements as specified in § 721.80(a) through (c). It is a significant new use to manufacture, process, or use the substance in any manner that results in inhalation or dermal exposure.
(iv) *Release to water.* Requirements as specified in § 721.90(a)(4), (b)(4), and (c)(4), where N = 50.
(b) *Specific requirements.* The provisions of subpart A of this part apply to this section except as modified by this paragraph (b).
(1) *Recordkeeping.* Recordkeeping requirements as specified in § 721.125(a) through (i), and (k) are applicable to manufacturers, importers, and processors of this substance.
(2) *Limitation or revocation of certain notification requirements.* The provisions of § 721.185 apply to this section.
[89 FR 100365, Dec. 12, 2024]