40 CFR § 180.638 - Pyroxsulam; tolerances for residues.

---
identifier: "/us/cfr/t40/s180.638"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 180.638 - Pyroxsulam; tolerances for residues."
title_number: 40
title_name: "Protection of Environment"
section_number: "180.638"
section_name: "Pyroxsulam; tolerances for residues."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "E"
subchapter_name: "PESTICIDE PROGRAMS"
part_number: "180"
part_name: "TOLERANCES AND EXEMPTIONS FOR PESTICIDE CHEMICAL RESIDUES IN FOOD"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "21 U.S.C. 321(q), 346a and 371."
regulatory_source: "36 FR 22540, Nov. 25, 1971, unless otherwise noted."
cfr_part: "180"
---


# 180.638 Pyroxsulam; tolerances for residues.

(a) *General.* Tolerances are established for residues of pyroxsulam, including its metabolites and degradates, in or on the commodities listed in the table below. Compliance with the tolerance levels specified below is to be determined by measuring only pyroxsulam, N-(5,7-dimethoxy[l, 2,4]triazolo[l, 5-a]pyrimidin-2-yl)-2-methoxy-4-(trifluoromethyl)-3-pyridinesulfonamide, in or on the commodity.

| Commodity | Parts per million |
| --- | --- |
| Teff, forage | 0.06 |
| Teff, grain | 0.01 |
| Teff, hay | 0.01 |
| Teff, straw | 0.03 |
| Wheat, forage | 0.06 |
| Wheat, grain | 0.01 |
| Wheat, hay | 0.01 |
| Wheat, straw | 0.03 |

(b) *Section 18 emergency exemptions.* [Reserved]

(c) *Tolerances with regional registrations.* [Reserved]

(d) *Indirect or inadvertent residues.* [Reserved]

[73 FR 10402, Feb. 27, 2008, as amended at 82 FR 30990, July 5, 2017; 83 FR 31895, July 10, 2018]