# 721.11715 Nonane, branched.
(a) *Chemical substance and significant new uses subject to reporting.* (1) The chemical substance identified as nonane, branched (PMN P-21-125; CAS No. 85408-10-2) 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) through (5), (a)(6)(v) and (vi), (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 50. For purposes of § 721.63(b), the concentration is set at 1.0%.
(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 0.72 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 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), (3), and (5). For purposes of § 721.72(e), the concentration is set at 1.0%. For purposes of § 721.72(g)(1), this substance may cause: skin irritation; eye irritation; reproductive toxicity; specific target organ toxicity; aspiration hazard. For purposes of § 721.72(g)(3), this substance may be: toxic to aquatic life. 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).
(iv) *Release to water.* Requirements as specified in § 721.90(a)(1), (b)(1), and (c)(1).
(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.
[88 FR 13701, Mar. 6, 2023]