40 CFR § 180.356 - Norflurazon; tolerances for residues.

---
identifier: "/us/cfr/t40/s180.356"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 180.356 - Norflurazon; tolerances for residues."
title_number: 40
title_name: "Protection of Environment"
section_number: "180.356"
section_name: "Norflurazon; 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"
---


# 180.356 Norflurazon; tolerances for residues.

(a) *General.* Tolerances are established for the combined residues of the herbicide norflurazon (4-chloro-5-(methylamino)-2-(alpha, alpha, alpha-trifluoro-*m*-tolyl)-3-(2*H*)-pyridazinone) and its desmethyl metabolite 4-chloro-5-(amino)-2-alpha, alpha, alpha-trifluoro-*m*-tolyl)-3(2*H*)-pyridazinone in or on the following raw agricultural commodities:

| Commodity | Parts per million |
| --- | --- |
| Alfalfa, forage | 3.0 |
| Alfalfa, hay | 5.0 |
| Alfalfa, seed | 0.1 |
| Almond, hulls | 1.0 |
| Almond | 0.1 |
| Apple | 0.1 |
| Apricot | 0.1 |
| Asparagus | 0.05 |
| Avocado | 0.20 |
| Blackberry | 0.1 |
| Blueberry | 0.2 |
| Cattle, fat | 0.1 |
| Cattle, liver | 0.50 |
| Cattle, meat | 0.1 |
| Cattle, meat byproducts, except liver | 0.1 |
| Cherry | 0.1 |
| Citrus, dried pulp | 0.4 |
| Citrus, molasses | 1.0 |
| Cotton, undelinted seed | 0.1 |
| Cranberry | 0.1 |
| Fruit, citrus | 0.2 |
| Goat, fat | 0.1 |
| Goat, liver | 0.50 |
| Goat, meat | 0.1 |
| Goat, meat byproducts, except liver | 0.1 |
| Grape | 0.1 |
| Hazelnut | 0.1 |
| Hog, fat | 0.1 |
| Hog, liver | 0.50 |
| Hog, meat | 0.1 |
| Hog, meat byproducts, except liver | 0.1 |
| Hop, dried cones | 3.0 |
| Hop, vines | 1.0 |
| Horse, fat | 0.1 |
| Horse, liver | 0.50 |
| Horse, meat | 0.1 |
| Horse, meat byproducts, except liver | 0.1 |
| Milk | 0.1 |
| Nectarine | 0.1 |
| Peach | 0.1 |
| Peanut | 0.05 |
| Peanut, hay | 5.50 |
| Peanut, hay | 1.5 |
| Pear | 0.1 |
| Pecan | 0.1 |
| Plum, prune, fresh | 0.1 |
| Poultry, fat | 0.1 |
| Poultry, meat | 0.1 |
| Poultry, meat byproducts | 0.1 |
| Raspberry | 0.2 |
| Sheep, fat | 0.1 |
| Sheep, liver | 0.50 |
| Sheep, meat | 0.1 |
| Sheep, meat byproducts, except liver | 0.1 |
| Soybean | 0.1 |
| Soybean, forage | 1.0 |
| Soybean, hay | 1.0 |
| Walnut | 0.1 |

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

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

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

[47 FR 14909, Apr. 7, 1982]

For  citations affecting § 180.356, see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and at