40 CFR § 180.523 - Metaldehyde; tolerances for residues.

---
identifier: "/us/cfr/t40/s180.523"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 180.523 - Metaldehyde; tolerances for residues."
title_number: 40
title_name: "Protection of Environment"
section_number: "180.523"
section_name: "Metaldehyde; 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"
---


# 180.523 Metaldehyde; tolerances for residues.

(a) *General.* Tolerances are established for residues of the molluscicide metaldehyde, including its metabolites and degradates, in or on the commodities listed in the following table. Compliance with the specified tolerance levels is to be determined by measuring only metaldehyde, 2,4,6,8-tetramethyl-1,3,5,7-tetroxocane, in or on the commodity.

| Commodity | Parts per million |
| --- | --- |
| Artichoke, globe | 0.07 |
| Berry, low growing, subgroup 13-07G | 6.25 |
| Bushberry subgroup 13-07B | 0.15 |
| Cactus | 0.07 |
| Caneberry subgroup 13-07A | 0.15 |
| Corn, field, forage | 0.30 |
| Corn, field, grain | 0.05 |
| Corn, field, stover | 0.10 |
| Corn, sweet, forage | 0.30 |
| Corn, sweet, kernel plus cob with husks removed | 0.05 |
| Corn, sweet, stover | 0.10 |
| Fruit, citrus, group 10-10 | 0.26 |
| Ginseng | 0.05 |
| Grass, forage | 2.0 |
| Grass, hay | 2.0 |
| Leaf petioles subgroup 4B | 0.50 |
| Lettuce | 1.73 |
| Pea and bean, succulent shelled, subgroup 6B | 0.20 |
| Peppermint, oil | 12 |
| Peppermint, tops | 4.0 |
| Spearmint, oil | 12 |
| Spearmint, tops | 4.0 |
| Taro, corm | 0.15 |
| Taro, leaves | 1.0 |
| Tomato subgroup 8-10A | 0.24 |
| Vegetable, brassica, leafy, group 5 | 2.5 |
| Vegetable, foliage of legume, except soybean, subgroup 7A | 1.5 |
| Vegetable, legume, edible podded subgroup 6A | 0.80 |
| Watercress | 3.2 |

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

(c) *Tolerances with regional registrations.* Tolerances with a regional registration as defined in § 180.1(l) are established for residues of the molluscicide metaldehyde, including its metabolites and degradates, in or on the following commodities. Compliance with the specified tolerance level is to be determined by measuring only metaldehyde, 2,4,6,8-tetramethyl-1,3,5,7-tetroxocane, in or on the commodity.

| Commodity | Parts per million |
| --- | --- |
| Beet, garden, leaves | 0.08 |
| Beet, garden, roots | 0.05 |
| Clover, forage | 0.60 |
| Clover, hay | 0.60 |
| Hop, dried cones | 0.10 |
| Rutabaga, roots | 0.05 |
| Soybean, seed | 0.05 |
| Turnip greens | 0.08 |
| Turnip, roots | 0.05 |
| Wheat, forage | 0.05 |
| Wheat, grain | 0.05 |
| Wheat, hay | 0.05 |
| Wheat, straw | 0.05 |

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

[73 FR 54963, Sept. 24, 2008, as amended at 78 FR 70869, Nov. 27, 2013; 80 FR 11588, Mar. 4, 2015; 81 FR 71638, Oct. 18, 2016]