---
kind: "section"
citation: "40 C.F.R. § 180.1130"
title: "40"
number: "180.1130"
heading: "N-(n-octyl)-2-pyrrolidone and N-(n-dodecyl)-2-pyrrolidone; exemptions from the requirement of a tolerance."
url: "https://uscodex.org/cfr/40/180.1130"
---

# §180.1130. N-(n-octyl)-2-pyrrolidone and N-(n-dodecyl)-2-pyrrolidone; exemptions from the requirement of a tolerance.

- (a) **N—** (n-octyl)-2-pyrrolidone and N-(n-dodecyl)-2-pyrrolidone are exempt from the requirement of a tolerance when used as solvents in cotton defoliant formulations containing thidiazuron and diuron as active ingredients.
- (b) **N—** (n-octyl)-2-pyrrolidone is exempt from the requirement of a tolerance when used as a solvent in formulations containing pyraflufen-ethyl as an active ingredient at a concentration not to exceed 20% by weight.
- (c) **N—** (n-Octyl)-2-pyrrolidone is exempt from the requirement of a tolerance when used as a solvent in formulations containing prothioconazole as an active ingredient at a concentration not to exceed 15% by weight.

## Notes

### Amendments

[79 FR 10682, Feb. 26, 2014, as amended at 88 FR 47778, July 25, 2023]

### Authority

Authority: 21 U.S.C. 321(q), 346a and 371.

### Source

Source: 36 FR 22540, Nov. 25, 1971, unless otherwise noted.

### Amendments

[79 FR 10682, Feb. 26, 2014, as amended at 88 FR 47778, July 25, 2023]