Section 180.537 - Isoxaflutole; tolerances for residues(a)General. Tolerances are established for residues of the herbicide, isoxaflutole, including its metabolites and degradates, in or on the commodities in the table below. Compliance with the tolerance levels specified below is to be determined by measuring only the sum of isoxaflutole ((5-cyclopropyl-4-isoxazolyl) [2-(methylsulfonyl)-4-(trifluoromethyl)phenyl] methanone) and its metabolite 1-(2-methylsulfonyl-4-trifluoromethylphenyl)-2-cyano-3-cyclopropyl propan-1,3-dione (RPA 202248), calculated as the stoichiometric equivalent of isoxaflutole, in or on the commodity: | Commodity | Parts per million |
| Corn, field, forage | 0.04 |
| Corn, field, grain | 0.02 |
| Corn, field, stover | 0.02 |
| Grain, aspirated fractions | 0.30 |
| Soybean, seed | 0.05 |
(b)Section 18 emergency exemptions. [Reserved](c)Tolerances with regional registrations. [Reserved](d)Indirect or inadvertent residues. [Reserved]63 FR 50784, Sept. 23, 1998, as amended at 73 FR 75608 , Dec. 12, 2008; 76 FR 76314 , Dec. 7, 2011