40 CFR § 721.10091 - 2(1H)-Pyrimidinone, tetrahydro-1,3-dimethyl-.

---
identifier: "/us/cfr/t40/s721.10091"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 721.10091 - 2(1H)-Pyrimidinone, tetrahydro-1,3-dimethyl-."
title_number: 40
title_name: "Protection of Environment"
section_number: "721.10091"
section_name: "2(1H)-Pyrimidinone, tetrahydro-1,3-dimethyl-."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "R"
subchapter_name: "TOXIC SUBSTANCES CONTROL ACT"
part_number: "721"
part_name: "SIGNIFICANT NEW USES OF CHEMICAL SUBSTANCES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "15 U.S.C. 2604, 2607, and 2625(c)."
regulatory_source: "49 FR 35018, Sept. 5, 1984, unless otherwise noted."
cfr_part: "721"
---


# 721.10091 2(1H)-Pyrimidinone, tetrahydro-1,3-dimethyl-.

(a) *Chemical substance and significant new uses subject to reporting.* (1) The chemical substance identified as 2(1H)-pyrimidinone, tetrahydro-1,3-dimethyl- (PMN P-02-135; CAS No. 7226-23-5) 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)(i), (b), and (c). Best's Viton model #890, Best's Butyl model #874, and Best's Butyl #878 have been demonstrated to satisfy § 721.63(a)(3)(i). Other demonstrated impervious gloves that satisfy § 721.63(a)(3)(i) are permissible.

(ii) *Industrial, commercial, and consumer activities.* Requirements as specified in § 721.80 (f), (j) (aprotic solvent and catalyst), and (s) (20,000 kg).

(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, importers, and processors of this substance.

(2) *Limitations 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 this section.

[73 FR 65758, Nov. 5, 2008]