Regulations last checked for updates: Feb 16, 2025

Title 40 - Protection of Environment last revised: Nov 16, 2025
All TitlesTitle 40Chapter IPart 180Subpart C - Subpart C—Specific Tolerances
View all text of Subpart C [§ 180.101 - § 180.726]
§ 180.438 - Lambda-cyhalothrin and an isomer gamma-cyhalothrin; tolerances for residues.

(a) General. (1) Tolerances are established for the combined residues of the pyrethroid lambda-cyhalothrin, 1:1 mixture of (S)-α-cyano-3-phenoxybenzyl-(Z)-(1R,3R)-3-(2-chloro-3,3,3-trifluoroprop-1-enyl)-2,2-dimethylcyclopropanecarboxylate and (R)-α-cyano-3-phenoxybenzyl-(Z)-(1S,3S)-3-(2-chloro-3,3,3-trifluoroprop-1-enyl)-2,2-dimethylcyclopropanecarboxylate and its epimer expressed as epimer of lambda-cyhalothrin, a 1:1 mixture of (S)-α-cyano-3-phenoxybenzyl-(Z)-(1S,3S)-3-(2-chloro-3,3,3-trifluoroprop-1-enyl)-2,2-dimethylcyclopropanecarboxylate and (R)-α-cyano-3-phenoxybenzyl-(Z)-(1R,3R)-3-(2-chloro-3,3,3-trifluoroprop-1-enyl)-2,2-dimethylcyclopropanecarboxylate, on plants and livestocks, as indicated in the following table.

Commodity Parts per million
Alfalfa, forage5.0
Alfalfa, hay6.0
Almond, hulls1.5
Apple, wet pomace2.50
Avocado, imported0.20
Barley, bran0.2
Barley, grain0.05
Barley, hay2.0
Barley, straw2.0
Brassica, head and stem, subgroup 5A0.4
Buckwheat, grain0.05
Canola, refined oil2.0
Canola, seed1.0
Cattle, fat3.0
Cattle, meat0.2
Cattle, meat byproducts0.2
Corn, field, flour0.15
Corn, field, forage6.0
Corn, field, grain0.05
Corn, field, stover1.0
Corn, pop, grain0.05
Corn, pop, grain, flour0.05
Corn, pop, stover1.0
Corn, sweet, forage6.0
Corn, sweet, stover1.0
Corn, sweet, kernel plus cob with husks removed0.05
Cotton, undelinted seed0.05
Egg0.01
Fruit, pome, group 110.30
Fruit, stone, group 120.50
Garlic0.1
Goat, fat3.0
Goat, meat0.2
Goat, meat byproducts0.2
Grain, aspirated fractions2.0
Grass, forage, fodder and hay, group 177.0
Hog, fat0.2
Hog, meat0.01
Hog, meat byproducts0.02
Hop, dried cones10.0
Horse, fat3.0
Horse, meat0.2
Horse, meat byproducts0.2
Lettuce, head2.0
Lettuce, leaf2.0
Milk, fat (reflecting 0.4 ppm in whole milk)10.0
Nut, tree, group 140.05
Oat, grain0.05
Oat, forage2.0
Oat, hay2.0
Oat, straw2.0
Onion, bulb0.1
Pea and bean, dried shelled, except soybean, subgroup 6C0.10
Pea and bean, succulent shelled, subgroup 6B0.01
Peanut0.05
Peanut, hay3.0
Pistachio0.05
Poultry, fat0.03
Poultry, meat0.01
Poultry, meat byproducts0.01
Rice, grain1.0
Rice, hulls5.0
Rice, wild, grain1.0
Rye, bran0.2
Rye, grain0.05
Rye, forage2.0
Rye, straw2.0
Sheep, fat3.0
Sheep, meat0.2
Sheep, meat byproducts0.2
Soybean0.01
Sorghum, grain, grain0.2
Sorghum, grain, forage0.30
Sorghum, grain, stover0.50
Sugarcane, cane0.05
Sunflower, forage0.2
Sunflower, seed, hulls0.50
Sunflower, refined oil0.30
Sunflower, seed0.2
Tomato0.1
Tomato, dry pomace6.0
Tomato, wet pomace6.0
Vegetable, cucurbit, group 90.05
Vegetable, fruiting, group 80.20
Vegetable, legume, edible podded, subgroup 6A0.20
Vegetable, tuberous and corm, subgroup 1C0.02
Wheat, grain0.05
Wheat, forage2.0
Wheat, hay2.0
Wheat, straw2.0
Wheat, bran0.2

(2) Tolerances 1 are established for the combined residues of the pyrethroid [gamma-cyhalothrin (the isolated active isomer of lambda-cyhalothrin) (S)-′-cyano-3-phenoxybenzyl (Z)-(1R,3R)-3-(2-chloro-3,3,3-trifluoroprop-1-enyl)-2,2-dimethylcyclopropanecarboxylate)) and its epimer (R)-′-cyano-3-phenoxybenzyl (Z)-(1R,3R)-3-(2-chloro-3,3,3-trifluoroprop-1-enyl)-2,2-dimethylcyclopropanecarboxylate in/on the following commodities:

Commodity Parts per million
Alfalfa, forage5
Alfalfa, hay6
Almond, hulls1.5
Apple, pomace, wet2.50
Avocado, imported0.20
Brassica, head and stem, subgroup 5A0.4
Canola, seed0.15
Cattle, fat3
Cattle, meat0.2
Cattle, meat byproducts0.2
Corn, field, flour0.15
Corn, field, forage6.0
Corn, field, grain0.05
Corn, field, stover1.0
Corn, pop, grain0.05
Corn, pop, stover1.0
Corn, sweet, forage6.0
Corn, sweet, kernel plus cob with husks removed0.05
Corn, sweet, stover1.0
Cotton, undelinted seed0.05
Egg0.01
Fruit, pome, group 110.30
Fruit, stone, group 120.50
Garlic0.10
Goat, fat3.0
Goat, meat0.2
Goat, meat byproducts0.2
Grain, aspirated fractions2.0
Hog, fat3.0
Hog, meat0.2
Hog, meat byproducts0.2
Horse, fat3.0
Horse, meat0.2
Horse, meat byproducts0.2
Lettuce, head2.0
Lettuce, leaf2.0
Milk, fat (reflecting 0.20 ppm in whole milk)5.0
Nut, tree, group 140.05
Okra0.20
Onion, bulb0.1
Pea and bean, dried shelled, except soybean, subgroup 6C0.10
Pea and bean, succulent shelled, subgroup 6B0.01
Peanut0.05
Peanut, hay3.0
Pistachio0.05
Poultry, fat0.03
Poultry, meat0.01
Poultry, meat byproducts0.01
Rice, grain1.0
Rice, hulls5.0
Sheep, fat3.0
Sheep, meat0.2
Sheep, meat byproducts0.2
Sorghum, grain, forage0.30
Sorghum, grain, grain0.20
Sorghum, grain, stover0.50
Soybean0.01
Sugarcane0.05
Sunflower, forage0.20
Sunflower, refined oil0.30
Sunflower, seed0.20
Sunflower, seed, hulls0.50
Tomato0.10
Tomato, dry pomace6.0
Tomato, wet pomace6.0
Vegetables, fruiting, group 80.20
Vegetable, legume, edible podded, subgroup 6A0.20
Wheat, bran2.0
Wheat, forage2.0
Wheat, grain0.05
Wheat, hay2.0
Wheat, straw2.0

1 The analytical enforcement methods for lambda-cyhalothrin are applicable for determination of gamma-cyhalothrin residues in plant and animal commodities.

(3) A tolerance of 0.01 part per million is established for residues of the insecticide lamba-cyhalothrin and an isomer gamma-cyhalothrin in or on all food commodities (other than those already covered by a higher tolerance as a result of use on growing crops) in food-handling establishments where food products are held, processed, or prepared.

(b) Section 18 emergency exemptions. [Reserved]

(c) Tolerances with regional registrations. [Reserved]

(d) Indirect or inadvertent residues. [Reserved]

[71 FR 74817, Dec. 13, 2006, as amended at 72 FR 45663, Aug. 15, 2007; 73 FR 39264, July 9, 2008; 76 FR 34885, June 15, 2011; 80 FR 72599, Nov. 20, 2015]
authority: 21 U.S.C. 321(q), 346a and 371
source: 36 FR 22540, Nov. 25, 1971, unless otherwise noted.
cite as: 40 CFR 180.438
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