# 721.11308 Mixed metal oxide (generic).
(a) *Chemical substance and significant new uses subject to reporting.* (1) The chemical substance generically identified as mixed metal oxide (PMN P-18-55) 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), (3) through (6), (b), and (c). When determining which persons are reasonably likely to be exposed as required for § 721.63(a)(1) and (4), 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. For purposes of § 721.63(a)(5), respirators must provide a National Institute for Occupational Safety and Health (NIOSH) assigned protection factor (APF) of at least 1,000. For purposes of § 721.63(a)(6), the airborne form(s) of the substance include particulate. For purposes of § 721.63(b), the concentration is set at 0.1%.
(A) As an alternative to the respirator requirements in paragraph (a)(2)(i) of this section, a manufacturer or processor may choose to follow the new chemical exposure limit (NCEL) provision listed in the TSCA Order for this substance. The NCEL is 0.04 mg/m
<sup>3</sup> as an 8-hour time weighted average. Persons who wish to pursue NCELs as an alternative to § 721.63 respirator requirements may request to do so under § 721.30. Persons whose § 721.30 requests to use the NCELs approach are approved by the EPA will be required to follow NCELs provisions comparable to those contained in the corresponding TSCA Order.
(B) [Reserved]
(ii) *Hazard communication.* Requirements as specified in § 721.72(a) through (f) and (g)(1), (2), and (5). For purposes of § 721.72(e), the concentration is set at 0.1%. For purposes of § 721.72(g)(1), this substance may cause: Allergic skin reaction; respiratory sensitization; germ cell mutagenicity; respiratory complications; cancer. For purposes of § 721.72(g)(2), when using this substance: Avoid skin contact; avoid breathing substance; avoid ingestion; use skin protection; use respiratory protection or maintain workplace airborne concentrations at or below an 8-hour time-weighted average of 0.04 mg/m
<sup>3</sup>. 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(k).
(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) are applicable to manufacturers and processors of this substance.
(2) *Limitation or revocation of certain notification requirements.* The provisions of § 721.185 apply to this section.
(3) *Determining whether a specific use is subject to this section.* The provisions of § 721.1725(b)(1) apply to paragraph (a)(2)(iii) of this section.
[86 FR 46144, Aug. 18, 2021]