Regulations last checked for updates: Oct 02, 2026

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

(a)(1) General. Tolerances are established for residues of the herbicide quinclorac, including its metabolites and degradates, in or on the commodities in the table in this paragraph. Compliance with the tolerance levels specified in this paragraph is to be determined by measuring only quinclorac, 3,7-dichloro-8-quinolinecarboxylic acid, in or on the commodity.

Table 1 to Paragraph (a)(1)

Commodity Parts per
million
Asparagus0.08
Barley, grain 12
Berry, low growing, except strawberry, subgroup 13-07H1.5
Bushberry subgroup 13-07B0.08
Caneberry subgroup 13-07A0.08
Cattle, fat0.7
Cattle, meat0.05
Cattle, meat byproducts1.5
Egg0.05
Goat, fat0.7
Goat, meat0.05
Goat, meat byproducts1.5
Grain, aspirated fractions 21200
Grass, forage150
Grass, hay130
Hog, fat 20.7
Hog, fat0.05
Hog, meat0.05
Hog, meat byproducts 21.5
Hog, meat byproducts0.05
Horse, fat0.7
Horse, meat0.05
Horse, meat byproducts1.5
Milk0.05
Poultry, fat0.05
Poultry, meat0.05
Poultry, meat byproducts 20.1
Poultry, meat byproducts0.05
Rhubarb0.5
Rice, bran30
Rice, grain10
Sheep, fat0.7
Sheep, meat0.05
Sheep, meat byproducts1.5
Sorghum, grain, forage3
Sorghum, grain, grain6
Sorghum, grain, stover1
Wheat, forage1
Wheat, germ0.75
Wheat, grain0.5
Wheat, hay0.5
Wheat, straw0.1

1 There are no U.S. registrations.

2 This tolerance expires on August 26, 2026.

(2) Tolerances are established for residues of the herbicide quinclorac, including its metabolites and degradates, in or on the commodity in the following table. Compliance with the tolerance levels specified in this paragraph is to be determined by measuring only quinclorac, 3,7-dichloro-8-quinolinecarboxylic acid, and its methyl ester, methyl-3,7-dichloro-8-quinolinecarboxylate, calculated as the stoichiometric equivalent of quinclorac, in or on the commodity.

Table 2 to Paragraph (a)(2)

Commodity Parts per million
Rapeseed, subgroup 20A 11.5

1 There are no U.S. Registrations.

(b) [Reserved]

(c) Tolerances with regional registrations. [Reserved]

(d) Indirect or inadvertent residues. [Reserved]

[57 FR 47996, Oct. 21, 1992, as amended at 64 FR 6548, 6549, Feb. 10, 1999; 64 FR 14632, Mar. 26, 1999; 65 FR 33701, May 24, 2000; 67 FR 35049, May 17, 2002; 72 FR 55073, Sept. 28, 2007; 74 FR 51490, Oct. 7, 2009; 74 FR 67090, Dec. 18, 2009; 76 FR 23497, Apr. 27, 2011; 77 FR 75566, Dec. 21, 2012; 78 FR 71528, Nov. 29, 2013; 80 FR 72599, Nov. 20, 2015; 82 FR 57149, Dec. 4, 2017; 85 FR 43702, July 20, 2020; 91 FR 9727, Feb. 27, 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 180.463