---
kind: "section"
citation: "40 C.F.R. § 721.12131"
title: "40"
number: "721.12131"
heading: "Poly[oxy(methyl-1,2-ethanediyl)], .alpha.-hydro-.omega.-[[2-[(1-chloro-9-oxo-9H-thioxanthen-4-yl)oxy]acetyl]oxy]-, ether with 2,2-bis(hydroxymethyl)-1,3-propanediol (4:1)."
url: "https://uscodex.org/cfr/40/721.12131"
---

# §721.12131. Poly[oxy(methyl-1,2-ethanediyl)], .alpha.-hydro-.omega.-[[2-[(1-chloro-9-oxo-9H-thioxanthen-4-yl)oxy]acetyl]oxy]-, ether with 2,2-bis(hydroxymethyl)-1,3-propanediol (4:1).

- (a) **Chemical substance and significant new uses subject to reporting.**
  - (1) The chemical substance identified as poly[oxy(methyl-1,2-ethanediyl)], .alpha.-hydro-.omega.-[[2-[(1-chloro-9-oxo-9H-thioxanthen-4-yl)oxy]acetyl]oxy]-, ether with 2,2-bis(hydroxymethyl)-1,3-propanediol (4:1) (PMN P-23-134; CASRN 1003567-83-6) is subject to reporting under this section for the significant new uses described in [paragraph (a)(2)](#a-2) of this section.
  - (2) **The significant new uses are—**
    - (i) **Protection in the workplace.** Requirements as specified in § [721.63(a)(1)](/cfr/40/721.63.md?p=a-1) and [(3)](/cfr/40/721.63.md?p=a-3) and [(c)](/cfr/40/721.63.md?p=a-c). When determining which persons are reasonably likely to be exposed as required for [§ 721.63(a)(1)](/cfr/40/721.63.md?p=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.
    - (ii) **Hazard communication.** Requirements as specified in § [721.72(a) through (d)](/cfr/40/721.72.md?p=a..d), [(f)](/cfr/40/721.72.md?p=f), and [(g)(1)](/cfr/40/721.72.md?p=g-1) and [(5)](/cfr/40/721.72.md?p=g-5). For purposes of [§ 721.72(g)(1)](/cfr/40/721.72.md?p=g-1), this substance may cause: serious eye damage. 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(o)](/cfr/40/721.80.md?p=o). It is a significant new use to manufacture the substance at a molecular weight of 10,000 Daltons or greater.
- (b) **Specific requirements.** The provisions of [subpart A](/cfr/40/subpartA.md) of this part apply to this section except as modified by this [paragraph (b)](#b).
  - (1) **Recordkeeping.** Recordkeeping requirements as specified in [§ 721.125(a) through (i)](/cfr/40/721.125.md?p=a..i) are applicable to manufacturers, importers, and processors of this substance.
  - (2) **Limitation or revocation of certain notification requirements.** The provisions of [§ 721.185](/cfr/40/721.185.md) apply to this section.

## Notes

### Amendments

[91 FR 30229, May 22, 2026]

### Authority

Authority: 15 U.S.C. 2604, 2607, and 2625(c).

### Source

Source: 49 FR 35018, Sept. 5, 1984, unless otherwise noted.

### Amendments

[91 FR 30229, May 22, 2026]