Section 721.10018 - Calcium hydroxide oxide silicate (Ca[6](OH)[2]O[2](Si[2]O[5])[3])(a)Chemical substance and significant new uses subject to reporting.(1) The chemical substance identified as calcium hydroxide oxide silicate (Ca6(OH)2O2(Si2O5) 3) (PMN P-01-442; CAS No. 13169-90-9) 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)Industrial, commercial, and consumer activities. Requirements as specified in § 721.80 (f), (j) (use other than as filler to reinforce resins, additive for resins, and filter medium), (v)(1), and (x)(1).(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), and (i) are applicable to manufacturers, importers, and processors of this substance.(2)Limitations or revocation of certain notification requirements. The provisions of § 721.185 apply to this section. 72 FR 14701 , Mar. 29, 2007