Regulations last checked for updates: May 18, 2024

Title 40 - Protection of Environment last revised: May 16, 2024
§ 180.490 - Imazapic; tolerances for residues.

(a) General. (1) Tolerances are established for residues of the herbicide imazapic, including its metabolites and degradates, in or on the commodities listed in the following table. Compliance with the tolerance levels specified is to be determined by measuring the sum of imazapic (2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-methyl-3-pyridinecarboxylic acid) and its metabolites (±)-2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-hydroxymethyl-3-pyridinecarboxylic acid and (±)-2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-(β-D-glucopyranosyloxy)methyl-3-pyridinecarboxylic acid, calculated as the stoichiometric equivalent of imazapic.

Commodity Parts per million
Grass, forage15
Grass, hay30
Peanut0.1
Soybean, seed 10.40
Sugarcane, cane 20.03

1 There are no US registrations as of April 4, 2014.

2 There are no U.S. registrations as of June 4, 2014.

(2) Tolerances are established for residues of the herbicide imazapic, including its metabolites and degradates, in or on the commodities listed in the following table. Compliance with the tolerance levels specified is to be determined by measuring the sum of imazapic (2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-methyl-3-pyridinecarboxylic acid) and its metabolite (±)-2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-hydroxymethyl-3-pyridinecarboxylic acid, calculated as the stoichiometric equivalent of imazapic.

Commodity Parts per million
Cattle, fat0.10
Cattle, kidney1.0
Cattle, meat byproducts, except kidney0.1
Cattle, meat0.1
Goat, fat0.1
Goat, kidney1.0
Goat, meat byproducts, except kidney0.1
Goat, meat0.1
Horse, fat0.1
Horse, kidney1.0
Horse, meat byproducts, except kidney0.1
Horse, meat0.1
Milk0.1
Sheep, fat0.1
Sheep, kidney1.0
Sheep, meat byproducts, except kidney0.1
Sheep, meat0.1

(3) Tolerances are established for residues of the herbicide imazapic, including its metabolites and degradates, in or on the commodities listed in the following table. Compliance with the tolerance levels specified is to be determined by measuring only imazapic (2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-methyl-3-pyridinecarboxylic acid).

Table 3 to Paragraph (a)(3)

Commodity Parts per million
Rice, bran0.2
Rice, grain0.05

(b) Section 18 emergency exemptions. [Reserved]

(c) Tolerances with regional registrations. [Reserved]

(d) Indirect or inadvertent residues. [Reserved]

[64 FR 54224, Oct. 6, 1999, as amended at 66 FR 64774, Dec. 14, 2001; 66 FR 66332, Dec. 26, 2001; 78 FR 49932, Aug. 16, 2013; 79 FR 18818, Apr. 4, 2014; 79 FR 32170, June 4, 2014; 88 FR 52042, Aug. 7, 2023]
authority: 21 U.S.C. 321(q), 346a and 371
source: 36 FR 22540, Nov. 25, 1971, unless otherwise noted.
cite as: 40 CFR 180.490