40 CFR § 180.450 - Beta-(4-Chlorophenoxy)-alpha-(1,1-dimethylethyl)-1H-1,2,4-triazole-1-ethanol; tolerances for residues.

---
identifier: "/us/cfr/t40/s180.450"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 180.450 - Beta-(4-Chlorophenoxy)-alpha-(1,1-dimethylethyl)-1H-1,2,4-triazole-1-ethanol; tolerances for residues."
title_number: 40
title_name: "Protection of Environment"
section_number: "180.450"
section_name: "Beta-(4-Chlorophenoxy)-alpha-(1,1-dimethylethyl)-1H-1,2,4-triazole-1-ethanol; tolerances for residues."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "E"
subchapter_name: "PESTICIDE PROGRAMS"
part_number: "180"
part_name: "TOLERANCES AND EXEMPTIONS FOR PESTICIDE CHEMICAL RESIDUES IN FOOD"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "21 U.S.C. 321(q), 346a and 371."
regulatory_source: "36 FR 22540, Nov. 25, 1971, unless otherwise noted."
cfr_part: "180"
---


# 180.450 Beta-(4-Chlorophenoxy)-alpha-(1,1-dimethylethyl)-1H-1,2,4-triazole-1-ethanol; tolerances for residues.

(a) *General.* Tolerances are established for the combined residues of the fungicide β-(4-chlorophenoxy)-α-(1,1-dimethylethyl)-1*H*-1,2,4-triazole-1-ethanol (triadimenol) and its butanediol metabolite, 4-(4-chlorophenoxy)-2,2-dimethyl-4-(1*H*-1,2,4-triazol-l-yl)-1,3-butanediol, calculated as triadimenol, in or on the following commodities:

| Commodity | Parts per million | Expiration/Revocation Date |
| --- | --- | --- |
| Banana | 0.2 | None |
| Barley, grain | 0.05 | None |
| Barley, straw | 0.2 | None |
| Corn, field, forage | 0.05 | None |
| Corn, field, grain | 0.05 | None |
| Corn, field, stover | 0.05 | None |
| Corn, pop, grain | 0.05 | None |
| Corn, pop, stover | 0.05 | None |
| Corn, sweet, forage | 0.05 | None |
| Corn, sweet, kernel plus cob with husks removed | 0.05 | None |
| Corn, sweet, stover | 0.05 | None |
| Cotton, undelinted seed | 0.02 | None |
| Oat, forage | 2.5 | None |
| Oat, grain | 0.05 | None |
| Oat, straw | 0.2 | None |
| Rye, forage | 2.5 | None |
| Rye, grain | 0.05 | None |
| Rye, straw | 0.1 | None |
| Wheat, forage | 2.5 | None |
| Wheat, grain | 0.05 | None |
| Wheat, straw | 0.2 | None |
| There are no U.S. registrations for banana (whole) as of September 22, 1993. |  |  |

(b) *Section 18 emergency exemptions.* [Reserved]

(c) *Tolerances with regional registrations.* [Reserved]

(d) *Indirect or inadvertent residues.* [Reserved]

[73 FR 54962, Sept. 24, 2008, as amended at 74 FR 47457, Sept. 16, 2009; 76 FR 34885, June 15, 2011]