---
kind: "section"
citation: "40 C.F.R. § 721.3550"
title: "40"
number: "721.3550"
heading: "Dipropylene glycol dimethyl ether."
url: "https://uscodex.org/cfr/40/721.3550"
---

# §721.3550. Dipropylene glycol dimethyl ether.

- (a) **Chemical substances and significant new uses subject to reporting.**
  - (1) **The chemical substance identified as dipropylene glycol dimethyl ether (PMN P-93-507; CAS No.** 111109-77-4) is subject to reporting under this section for the significant new uses described in [paragraph (a)(2)](#a-2) of this section. This class 2 substance is exempt from the notification requirements of this rule if it contains less than 5 percent by weight of the specific isomer, propane, 2,2′-oxybis[1-methoxy- (CAS No. 189354-80-1), which is one of the possible products of the manufacturing process for PMN P-93-507.
  - (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), [(a)(2)(i)](/cfr/40/721.63.md?p=a-2-i), and [(a)(3)](/cfr/40/721.63.md?p=a-a-3).
    - (ii) **Industrial, commercial, and consumer activities.** Requirements as specified in [§ 721.80(o)](/cfr/40/721.80.md?p=o).
- (b) **Specific requirements.** The provisions of subpart A of this part apply to this section except as modified by this paragraph.
  - (1) **Recordkeeping requirements.** The following recordkeeping requirements specified in § [721.125 (a)](/cfr/40/721.125.md?p=a), [(b)](/cfr/40/721.125.md?p=b), [(c)](/cfr/40/721.125.md?p=c), [(d)](/cfr/40/721.125.md?p=d), and [(e)](/cfr/40/721.125.md?p=e) are applicable to manufacturers, importers, and processors of this substance.
  - (2) **Limitations or revocation of certain notification requirements.** The provisions of [§ 721.185](/cfr/40/721.185.md) apply to this section.

## Notes

### Amendments

[62 FR 59583, Nov. 4, 1997; 62 FR 63035, Nov. 26, 1997]

### Authority

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

### Source

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

### Amendments

[62 FR 59583, Nov. 4, 1997; 62 FR 63035, Nov. 26, 1997]