Regulations last checked for updates: Oct 02, 2026

Title 40 - Protection of Environment last revised: Sep 29, 2026
§ 180.301 - Carboxin; tolerances for residues.

(a) General. Tolerances are established for residues of carboxin, 5,6-dihydro-2-methyl-N-phenyl-1,4-oxathiin-3-carboxamide, including its metabolites and degradates, in or on the commodities in table 1 to Paragraph (a). Compliance with the tolerance levels specified in table 1 to Paragraph (a) is to be determined by measuring only those carboxin residues convertible to aniline, expressed as the stoichiometric equivalent of carboxin, in or on the commodities.

Table 1 to Paragraph (a)

Commodity Parts per million
Barley, grain0.2
Barley, hay0.2
Barley, straw0.2
Bean, succulent0.2
Cattle, fat0.05
Cattle, meat byproducts0.1
Cattle, meat0.05
Corn, field, forage0.2
Corn, field, grain0.2
Corn, field, stover0.2
Corn, pop, grain0.2
Corn, pop, stover0.2
Corn, sweet, forage0.2
Corn, sweet, kernel plus cob with husks removed0.2
Corn, sweet, stover0.2
Cotton, gin byproducts3
Cotton, undelinted seed0.2
Egg0.05
Goat, fat0.05
Goat, meat byproducts0.1
Goat, meat0.05
Hog, fat0.05
Hog, meat byproducts0.1
Hog, meat0.05
Horse, fat0.05
Horse, meat byproducts0.1
Horse, meat0.05
Milk0.05
Oat, forage0.5
Oat, grain0.2
Oat, hay0.2
Oat, straw0.2
Onion, bulb0.2
Peanut0.2
Peanut, hay0.2
Poultry, fat0.1
Poultry, meat byproducts0.1
Poultry, meat0.1
Rapeseed, seed0.03
Rice, grain0.2
Safflower, seed0.2
Sheep, fat0.05
Sheep, meat byproducts0.1
Sheep, meat0.05
Soybean, seed0.2
Vegetable, legume, forage and hay, except soybean, subgroup 7-22A2
Vegetable, legume, pulse, bean, dried shelled, except soybean, subgroup 6-22E0.2
Vegetable, legume, pulse, pea, dried shelled, subgroup 6-22F0.2
Wheat, forage0.5
Wheat, grain0.2
Wheat, hay0.2
Wheat, straw0.2

(b) Section 18 emergency exemptions. [Reserved]

(c) Tolerances with regional registrations. [Reserved]

(d) Indirect or inadvertent residues. [Reserved]

[47 FR 55222, Dec. 8, 1982, as amended at 50 FR 81, Jan. 2, 1985; 62 FR 4915, Feb. 3, 1997; 63 FR 4586, Jan. 30, 1998; 64 FR 11801, Mar. 10, 1999; 66 FR 9773, Feb. 12, 2001; 66 FR 64773, Dec. 14, 2001; 67 FR 40218, June 12, 2002; 67 FR 72853, Dec. 9, 2002; 71 FR 56383, Sept. 27, 2006; 80 FR 72598, Nov. 20, 2015; 91 FR 21388, Apr. 22, 2026; 91 FR 54234, Aug. 21, 2026]
authority: 21 U.S.C. 321(q), 346a and 371
source: 36 FR 22540, Nov. 25, 1971, unless otherwise noted.
cite as: 40 CFR 180.301