40 CFR § 180.275 - Chlorothalonil; tolerances for residues.

---
identifier: "/us/cfr/t40/s180.275"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 180.275 - Chlorothalonil; tolerances for residues."
title_number: 40
title_name: "Protection of Environment"
section_number: "180.275"
section_name: "Chlorothalonil; 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"
---


# 180.275 Chlorothalonil; tolerances for residues.

(a) *General.* (1) Tolerances are established for the fungicide chlorothalonil (tetrachloroisophthalonitrile) and its metabolite 4-hydroxy-2,5,6-trichloroisophthalonitrile in or on the following food commodities.

| Commodity | Parts per million |
| --- | --- |
| Almond | 0.05 |
| Almond, hulls | 1.0 |
| Apricot | 0.5 |
| Asparagus | 0.1 |
| Banana (NMT 0.05 ppm in edible pulp) | 0.5 |
| Bean, dry, seed | 0.1 |
| Bean, snap, succulent | 5 |
| Blueberry | 1.0 |
| Brassica, head and stem, subgroup 5A | 5.0 |
| Carrot, roots | 1 |
| Celery | 15 |
| Cherry, sweet | 0.5 |
| Cherry, tart | 0.5 |
| Cocoa bean, dried bean | 0.05 |
| Coffee, bean, green | 0.20 |
| Corn, sweet, kernel plus cob with husks removed | 1 |
| Cranberry | 5.0 |
| Ginseng | 4.0 |
| Horseradish | 4.0 |
| Lentil | 0.10 |
| Lychee | 15 |
| Mango | 1.0 |
| Mushroom | 1.0 |
| Nectarine | 0.5 |
| Okra | 6.0 |
| Onion, bulb | 0.5 |
| Onion, green | 5 |
| Papaya | 15 |
| Parsnip, roots | 1 |
| Passionfruit | 3 |
| Pea, edible podded | 5 |
| Peach | 0.5 |
| Peanut | 0.3 |
| Pistachio | 0.2 |
| Plum | 0.2 |
| Plum, prune | 0.2 |
| Potato | 0.1 |
| Rhubarb | 4.0 |
| Soybean | 0.2 |
| Starfruit | 3.0 |
| Tomato | 5 |
| Vegetable, cucurbit, group 9 | 5.0 |
| Vegetable, fruiting, group 8, except tomato | 6.0 |
| Yam, true | 0.10 |

(2) Tolerances are established for the metabolite 4-hydroxy-2,5,6-trichloroisophthalonitrile in or on the following food commodities.

| Commodity | Parts per million |
| --- | --- |
| Cattle, fat | 0.1 |
| Cattle, kidney | 0.5 |
| Cattle, meat byproducts, except kidney | 0.05 |
| Cattle, meat | 0.03 |
| Goat, fat | 0.1 |
| Goat, kidney | 0.5 |
| Goat, meat byproducts, except kidney | 0.05 |
| Goat, meat | 0.03 |
| Hog, fat | 0.1 |
| Hog, kidney | 0.5 |
| Hog, meat byproducts, except kidney | 0.05 |
| Hog, meat | 0.03 |
| Horse, fat | 0.1 |
| Horse, kidney | 0.5 |
| Horse, meat byproducts, except kidney | 0.05 |
| Horse, meat | 0.03 |
| Milk | 0.1 |
| Sheep, fat | 0.1 |
| Sheep, kidney | 0.5 |
| Sheep, meat byproducts, except kidney | 0.05 |
| Sheep, meat | 0.03 |

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

(c) *Tolerances with regional registrations.* Tolerances with regional registration, as defined in § 180.1(l), are established for the combined residues of chlorothalonil and its metabolite in or on the following raw agricultural commodities:

| Commodity | Parts per million |
| --- | --- |
| Hazelnut | 0.1 |
| Peppermint, tops | 2 |
| Persimmon | 1.5 |
| Spearmint, tops | 2 |

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

[42 FR 56114, Oct. 21, 1977]

For  citations affecting § 180.275, see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and at