---
kind: "section"
citation: "40 C.F.R. § 180.331"
title: "40"
number: "180.331"
heading: "4-(2,4-Dichlorophenoxy) butyric acid; tolerances for residues."
url: "https://uscodex.org/cfr/40/180.331"
---

# §180.331. 4-(2,4-Dichlorophenoxy) butyric acid; tolerances for residues.

- (a) **General.** Tolerances are established for residues of the herbicide 4-(2,4-dichlorophenoxy) butyric acid (2,4-DB), both free and conjugated, determined as the acid, in or on food commodities, as follows:
- (b) **Section 18 emergency exemptions.** [Reserved]
- (c) **Tolerances with regional registrations.** [Reserved]
- (d) **Indirect or inadvertent residues.** [Reserved]

## Notes

### Amendments

[73 FR 54961, Sept. 24, 2008, as amended at 74 FR 46374, Sept. 9, 2009]

### Authority

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

### Source

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

### Amendments

[73 FR 54961, Sept. 24, 2008, as amended at 74 FR 46374, Sept. 9, 2009]