Section 180.721 - Isoprothiolane; tolerances for residues(a)General. Tolerances are established for residues of the fungicide isoprothiolane, including its metabolites and degradates, in or on the commodities in Table 1 to this paragraph (a). Compliance with the tolerance levels specified in Table 1 to this paragraph (a) is to be determined by measuring only residues of isoprothiolane (bis(1-methylethyl) 2-(1,3-dithiolan-2-ylidene)propanedioate) in or on the commodities: Table 1 to Paragraph (a)
| Commodity | Parts per million |
| Banana1 | 0.9 |
| Rice, bran1 | 15 |
| Rice, husked1 | 6 |
| Rice, polished rice1 | 1.5 |
1 There are no U.S. registrations as of December 6, 2021.
86 FR 68925, Dec. 6, 2021