40 CFR § 721.11909 - 3,5,8-Trioxa-4-silaalkanoic acid, 4-ethenyl-4-(2-alkoxy-1-alkyl-2-oxoethoxy)-2,6-dialkyl-7-oxo-, alkyl ester (generic).

---
identifier: "/us/cfr/t40/s721.11909"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 721.11909 - 3,5,8-Trioxa-4-silaalkanoic acid, 4-ethenyl-4-(2-alkoxy-1-alkyl-2-oxoethoxy)-2,6-dialkyl-7-oxo-, alkyl ester (generic)."
title_number: 40
title_name: "Protection of Environment"
section_number: "721.11909"
section_name: "3,5,8-Trioxa-4-silaalkanoic acid, 4-ethenyl-4-(2-alkoxy-1-alkyl-2-oxoethoxy)-2,6-dialkyl-7-oxo-, alkyl ester (generic)."
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"
---


# 721.11909 3,5,8-Trioxa-4-silaalkanoic acid, 4-ethenyl-4-(2-alkoxy-1-alkyl-2-oxoethoxy)-2,6-dialkyl-7-oxo-, alkyl ester (generic).

(a) *Chemical substance and significant new uses subject to reporting.* (1) The chemical substance identified generically as 3,5,8-trioxa-4-silaalkanoic acid, 4-ethenyl-4-(2-alkoxy-1-alkyl-2-oxoethoxy)-2,6-dialkyl-7-oxo-, alkyl ester (PMN P-22-7) is subject to reporting under this section for the significant new uses described in paragraph (a)(2) of this section. The requirements of this section do not apply to quantities of the substance after they have been completely reacted or destroyed.

(2) The significant new uses are:

(i) *Protection in the workplace.* Requirements as specified in § 721.63(a)(1) and (3), (b), and (c). When determining which persons are reasonably likely to be exposed as required for § 721.63(a)(1), 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(b), the concentration is set at 1.0%.

(ii) *Hazard communication.* Requirements as specified in § 721.72(a) through (f), and (g)(1) 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: eye irritation; reproductive toxicity; specific target organ toxicity. 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.* It is a significant new use to process for use or use the substance other than as a crosslinker in formulating general purpose sealants and adhesives. It is a significant new use to process for use or use the substance in consumer products other than in the form of a paste. It is a significant new use to process for use or use the substance where the concentration of the substance exceeds 6% by weight in consumer products. It is a significant new use to manufacture, process, or use the substance in any manner that results in inhalation exposure.

(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) 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.

[90 FR 35628, July 29, 2025]