---
kind: "section"
citation: "40 C.F.R. § 180.155"
title: "40"
number: "180.155"
heading: "1-Naphthaleneacetic acid; tolerances for residues."
url: "https://uscodex.org/cfr/40/180.155"
---

# §180.155. 1-Naphthaleneacetic acid; tolerances for residues.

- (a) **General.** Tolerances are established for the residues of 1-naphthaleneacetic acid, including its metabolites and degradates in or on the commodities in the following table. Compliance with the tolerance levels specified is to be determined by measuring only 1-naphthaleneacetic acid and its conjugates, calculated as the Stoichiometric equivalent of 1-naphthaleneacetic acid, in or on the commodity.
- (b) **Section 18 emergency exemptions.** [Reserved]
- (c) **Tolerances with regional registrations.** [Reserved]
- (d) **Indirect or inadvertent residues.** [Reserved]

## Notes

### Amendments

[78 FR 30218, May 22, 2013, as amended at 80 FR 77260, Dec. 14, 2015; 91 FR 21388, Apr. 22, 2026]

### Authority

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

### Source

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

### Amendments

[78 FR 30218, May 22, 2013, as amended at 80 FR 77260, Dec. 14, 2015; 91 FR 21388, Apr. 22, 2026]