Section 721.10747 - 4-Pyrimidianamine, 2,5 dimethoxy-(a)Chemical substance and significant new uses subject to reporting.(1) The chemical substance identified as 4-pyrimidianamine, 2,5 dimethoxy- (PMN P-13-773; CAS No. 6960-17-4) 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), (a)(2)(i), (a)(3), (a)(4), (a)(6)(ii), (a)(6)(v), (b) (concentration set at 0.1 percent) and (c). When determining which persons are reasonably likely to be exposed as required for § 721.63(a)(1) and (a)(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. The following National Institute for Occupational Safety and Health (NIOSH)-certified respirators with an assigned protection factor (APF) of at least 10 meet the requirements of § 721.63(a)(4) : (A) NIOSH-certified power air-purifying respirator with a hood or helmet and with appropriate gas/vapor (acid gas, organic vapor, or substance specific) cartridges in combination with HEPA filters;(B) NIOSH-certified continuous flow supplied-air respirator equipped with a loose fitting facepiece, hood, or helmet;(C) NIOSH-certified negative pressure (demand) supplied-air respirator with a full facepiece.(ii)Industrial, commercial, and consumer activities. Requirements as specified in § 721.80 . A significant new use is any use other than as an herbicide intermediate.(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), (d), (e) and (i) are applicable to manufacturers and processors of this substance.(2)Limitations or revocation of certain notification requirements. The provisions of § 721.185 apply to this section. 79 FR 39286 , July 9, 2014