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§ 721.10602 Lead niobium titanium zirconium oxide.
(a) Chemical substance and significant new uses subject to reporting. (1) The chemical substance identified as lead niobium titanium zirconium oxide (PMN P-11-274; CAS No. 56572-83-9) 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)(6)(i), and (c). The following National Institute for Occupational Safety and Health (NIOSH)-certified respirators with an assigned protection factor (APF) of at least 50 meet the requirements of § 721.63(a)(4):