---
kind: "section"
citation: "40 C.F.R. § 180.662"
title: "40"
number: "180.662"
heading: "Trinexapac-ethyl; tolerances for residues."
url: "https://uscodex.org/cfr/40/180.662"
---

# §180.662. Trinexapac-ethyl; tolerances for residues.

- (a) **General.** Tolerances are established for residues of the plant growth regulator, trinexapac-ethyl, including its metabolites and degradates, in or on the commodities in table 1 to this [paragraph (a)](#a). Compliance with the tolerance levels specified in table 1 is to be determined by measuring only the free and conjugated forms of both trinexapac-ethyl, ethyl 4-(cyclopropylhydroxymethylene)-3,5-dioxocyclohexanecarboxylate and trinexapac, 4-(cyclopropylhydroxymethylene)-3,5-dioxocyclohexanecarboxylic acid, calculated as the stoichiometric equivalent of trinexapac-ethyl, in or on the commodity.
- (b) [Reserved]
- (c) **Tolerances with regional registrations.** Tolerances with regional registrations, as defined in [§ 180.1](/cfr/40/180.1.md), are established for residues of trinexapac-ethyl, including its metabolites and degradates, in or on the commodities in table 2 to this [paragraph (c)](#c). Compliance with the tolerance levels specified in table 2 is to be determined by measuring only the free and conjugated forms of both trinexapac-ethyl, ethyl 4-(cyclopropylhydroxymethylene)-3,5-dioxocyclohexanecarboxylate and trinexapac, 4-(cyclopropylhydroxymethylene)-3,5-dioxocyclohexanecarboxylic acid, calculated as the stoichiometric equivalent of trinexapac-ethyl, in or on the commodity.
- (d) [Reserved]

## Notes

### Amendments

[88 FR 18434, Mar. 29, 2023]

### Authority

Authority: 21 U.S.C. 321(q), 346a and 371.

### Source

Source: 36 FR 22540, Nov. 25, 1971, unless otherwise noted.

### Amendments

[88 FR 18434, Mar. 29, 2023]