40 CFR § 180.464 - Dimethenamid; tolerances for residues.

---
identifier: "/us/cfr/t40/s180.464"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 180.464 - Dimethenamid; tolerances for residues."
title_number: 40
title_name: "Protection of Environment"
section_number: "180.464"
section_name: "Dimethenamid; 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"
---


# 180.464 Dimethenamid; tolerances for residues.

(a) *General.* Tolerances are established for residues of the herbicide dimethenamid, 1(R,S)-2-chloro-*N*-[(1-methyl-2-methoxy)ethyl]-*N*-(2,4-dimethylthien-3-yl)-acetamide, applied as either the 90:10 or 50:50 S:R isomers, in or on the following food commodities:

| Commodity | Parts per million |
| --- | --- |
| Bean, dry, seed | 0.01 |
| Beet, garden, roots | 0.01 |
| Beet, garden, tops | 0.01 |
| Beet, sugar, dried pulp | 0.01 |
| Beet, sugar, molasses | 0.01 |
| Beet, sugar, roots | 0.01 |
| Beet, sugar, tops | 0.01 |
| Corn, field, forage | 0.01 |
| Corn, field, grain | 0.01 |
| Corn, field, stover | 0.01 |
| Corn, pop, forage | 0.01 |
| Corn, pop, grain | 0.01 |
| Corn, pop, stover | 0.01 |
| Corn, sweet, forage | 0.01 |
| Corn, sweet, kernel plus cob with husks removed | 0.01 |
| Corn, sweet, stover | 0.01 |
| Cotton, gin byproducts | 1.5 |
| Cottonseed subgroup 20C | 0.01 |
| Garlic | 0.01 |
| Grass, forage | 0.15 |
| Grass, hay | 2.5 |
| Grass, seed screenings | 0.01 |
| Grass, straw | 0.01 |
| Hop, dried cones | 0.05 |
| Horseradish | 0.01 |
| Leek | 0.01 |
| Onion, bulb | 0.01 |
| Onion, green | 0.01 |
| Onion, Welsh | 0.01 |
| Peanut | 0.01 |
| Peanut, hay | 0.01 |
| Radish, roots | 0.01 |
| Radish, tops | 0.01 |
| Rutabaga, roots | 0.01 |
| Rutabaga, tops | 0.1 |
| Shallot, bulb | 0.01 |
| Shallot, fresh leaves | 0.01 |
| Sorghum, grain, forage | 0.01 |
| Sorghum, grain, grain | 0.01 |
| Sorghum, grain, stover | 0.01 |
| Soybean, seed | 0.01 |
| Turnip, greens | 0.1 |
| Turnip, roots | 0.01 |
| Turnip, tops | 0.1 |
| Vegetable, tuberous and corm, subgroup 1C | 0.01 |

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

(c) *Tolerances with regional registrations.* Tolerances with regional registration are established for residues of dimethenamid, 1 (R,S)-2-chloro-N-[(1-methyl-2-methoxy) ethyl]-N-(2,4-dimethylthien-3-yl)-acetamide) in or on the following raw agricultural commodities:

| Commodity | Parts per million |
| --- | --- |
| Pumpkin | 0.01 |
| Squash, winter | 0.01 |

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

[65 FR 51551, Aug. 24, 2000, as amended at 67 FR 46884, July 17, 2002; 69 FR 29459, May 24, 2004; 69 FR 57207, Sept. 24, 2004; 70 FR 24712, May 11, 2005; 71 FR 25942, May 3, 2006; 71 FR 49354, Aug. 23, 2006; 72 FR 44388, Aug. 8, 2007; 72 FR 73630, Dec. 28, 2007; 80 FR 9215, Feb. 20, 2015]