---
kind: "section"
citation: "40 C.F.R. § 180.316"
title: "40"
number: "180.316"
heading: "Pyrazon; tolerances for residues."
url: "https://uscodex.org/cfr/40/180.316"
---

# §180.316. Pyrazon; tolerances for residues.

- (a) **General.** Tolerances are established for combined residues of the herbicide pyrazon (5-amino-4-chloro-2-phenyl-3(2H)-pyridazinone) and its metabolites (calculated as pyrazon) in or on the commodities in Table 1 to [paragraph (a)](#a).
- (b) -(c) [Reserved]
- (d) **Indirect or inadvertent residues.** Tolerances are established for combined residues of the herbicide pyrazon, 5-amino-4-chloro-2-phenyl-3(2H)-pyridazinone, and its metabolites (calculated as pyrazon), in or on the commodities in Table 2 to [paragraph (d)](#d).

## Notes

### Amendments

[91 FR 9726, Feb. 27, 2026]

### Authority

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

### Source

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

### Amendments

[91 FR 9726, Feb. 27, 2026]