40 CFR § 180.332 - Metribuzin; tolerances for residues.

---
identifier: "/us/cfr/t40/s180.332"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 180.332 - Metribuzin; tolerances for residues."
title_number: 40
title_name: "Protection of Environment"
section_number: "180.332"
section_name: "Metribuzin; 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"
---


# 180.332 Metribuzin; tolerances for residues.

(a) *General.* Tolerances are established for combined residues of the herbicide metribuzin (4-amino-6-(1,1-dimethyl- ethyl)-3-(methylthio)-;1,2,4-triazin-5(4*H*)-one) and its triazinone metabolites in or on food commodities:

| Commodity | Parts per million |
| --- | --- |
| Alfalfa, forage | 2.0 |
| Alfalfa, hay | 7.0 |
| Asparagus | 0.1 |
| Barley, grain | 0.75 |
| Barley, hay | 7.0 |
| Barley, pearled barley | 3.0 |
| Barley, straw | 1.0 |
| Carrot, roots | 0.3 |
| Cattle, fat | 0.7 |
| Cattle, meat | 0.7 |
| Cattle, meat byproducts | 0.7 |
| Corn, field, forage | 0.1 |
| Corn, field, grain | 0.05 |
| Corn, field, stover | 0.1 |
| Corn, pop, grain | 0.05 |
| Corn, sweet, forage | 0.1 |
| Corn, sweet, kernel plus cob with husks removed | 0.05 |
| Corn, sweet, stover | 0.1 |
| Egg | 0.01 |
| Goat, fat | 0.7 |
| Goat, meat | 0.7 |
| Goat, meat byproducts | 0.7 |
| Grass, forage | 2.0 |
| Grass, hay | 7.0 |
| Hog, fat | 0.7 |
| Hog, meat | 0.7 |
| Hog, meat byproducts | 0.7 |
| Horse, fat | 0.7 |
| Horse, meat | 0.7 |
| Horse, meat byproducts | 0.7 |
| Lentil | 0.05 |
| Milk | 0.05 |
| Pea, dry, seed | 0.05 |
| Pea, field, hay | 4.0 |
| Pea, field, vines | 0.5 |
| Pea, succulent | 0.1 |
| Potato | 0.6 |
| Potato, chips | 3.0 |
| Potato, processed potato waste | 3.0 |
| Poultry, fat | 0.7 |
| Poultry, meat | 0.7 |
| Poultry, meat byproducts | 0.7 |
| Sainfoin, forage | 2.0 |
| Sainfoin, hay | 7.0 |
| Sheep, fat | 0.7 |
| Sheep, meat | 0.7 |
| Sheep, meat byproducts | 0.7 |
| Soybean, seed | 0.3 |
| Soybean, forage | 4.0 |
| Soybean, hay | 4.0 |
| Sugarcane, cane | 0.1 |
| Sugarcane, molasses | 2.0 |
| Tomato | 0.1 |
| Wheat, bran | 3.0 |
| Wheat, forage | 2.0 |
| Wheat, germ | 3.0 |
| Wheat, grain | 0.75 |
| Wheat, hay | 7.0 |
| Wheat, middlings | 3.0 |
| Wheat, shorts | 3.0 |
| Wheat, straw | 1.0 |

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

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

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

[42 FR 62913, Dec. 14, 1977, as amended at 43 FR 41396, Sept. 18, 1978; 44 FR 26744, May 7, 1979; 44 FR 45387, Aug. 2, 1979; 52 FR 23654, June 24, 1987; 55 FR 26440, June 28, 1990; 62 FR 66024, 66025, Dec. 17, 1997; 65 FR 33698, May 24, 2000; 66 FR 63198, Dec. 5, 2001; 67 FR 49617, July 31, 2002]