# 2025-10208: EPA Reviews Food Residue Rules for Hydrogen Cyanide

2025-10208, Pesticide Tolerances; Implementing Registration Review Decisions for Certain Pesticides; Hydrogen Cyanide, et al., is a Federal Register proposed rule from Environmental Protection Agency published 2025-06-09, effective These tolerance actions would be effective on the date of publication of the final rule in the Federal Register. For actions in the final rule that lower or revoke existing tolerances, EPA proposes to add an expiration date for the existing tolerance of 180 days (approximately 6 months) after the date of publication of the final rule in the Federal Register to allow a reasonable interval for producers in exporting members of the World Trade Organization's (WTO's) Sanitary and Phytosanitary (SPS) Measures Agreement to adapt to the requirements.; PRIA reads it as touching household money (as of 2026-10-29).

- Canonical: https://policyrisk.com/federal-register/2025-10208
- As of: 2026-10-29
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2025-10208
- Title: Pesticide Tolerances; Implementing Registration Review Decisions for Certain Pesticides; Hydrogen Cyanide, et al.
- Type: Proposed Rule
- Agencies: Environmental Protection Agency
- Citation: 90 FR 24259
- Published: 2025-06-09
- Effective: These tolerance actions would be effective on the date of publication of the final rule in the Federal Register. For actions in the final rule that lower or revoke existing tolerances, EPA proposes to add an expiration date for the existing tolerance of 180 days (approximately 6 months) after the date of publication of the final rule in the Federal Register to allow a reasonable interval for producers in exporting members of the World Trade Organization's (WTO's) Sanitary and Phytosanitary (SPS) Measures Agreement to adapt to the requirements.
- Comments close: not stated
- Significant: no
- Touches household money: yes
- Regulation identifier numbers: 2070-ZA16
- Last updated: 2026-10-29

## In one line

EPA Reviews Food Residue Rules for Hydrogen Cyanide

## Summary

The EPA is updating rules about how much pesticide residue is allowed on food, focusing on hydrogen cyanide and a few others. Farmers, food makers, and pesticide companies should pay attention because these changes keep food safe and fair. You’ve got until August 8, 2025, to share your thoughts before the new rules kick in—no extra costs, just smarter safety checks!

## Abstract

The Environmental Protection Agency (EPA or Agency) is proposing to implement several tolerance actions under the Federal Food, Drug, and Cosmetic Act (FFDCA) that the Agency determined were necessary or appropriate during the registration review conducted under the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA). During registration review, EPA reviews all aspects of a pesticide case, including existing tolerances, to ensure that the pesticide continues to meet the standard for registration under FIFRA. The pesticide tolerances and active ingredients addressed in this rulemaking are identified and discussed in detail in Unit III. of this document.

## Effects PRIA read

- Who may be affected (NAICS list): mixed, low. You may be affected if you are an agricultural producer, food manufacturer, or pesticide manufacturer. The notice lists NAICS codes as examples: Crop production (111), Animal production (112), Food manufacturing (311), and Pesticide manufacturing (32532).
- 180‑Day Adaptation Window for Exporters: benefit, medium. If the final rule lowers or revokes a tolerance, EPA proposes to keep the existing tolerance in effect for 180 days (about 6 months) after the final rule is published in the Federal Register so exporters in WTO member countries can adapt to the new requirements.
- Revoking Specific 2,4‑DB Tolerances (Dec 8, 2025): cost, medium. EPA proposes to revoke the tolerances for 2,4‑DB on Clover, forage; Clover, hay; Peppermint, tops; and Spearmint, tops, and is establishing an expiration date of December 8, 2025 for these tolerances.
- New Ethofumesate Tolerances for Feed and Grain: benefit, medium. EPA proposes new ethofumesate tolerances for indirect or inadvertent residues: Animal feed, nongrass, group 18 at 1.5 ppm; Grain, cereal, forage, hay, stover, and straw, group 16-22 at 1.5 ppm; and Vegetable, legume, forage and hay, group 7-22 at 0.5 ppm.
- Removal of Ethofumesate Tolerance for Beet Sugar Tops: cost, medium. EPA proposes to remove the ethofumesate tolerance for 'Beet, sugar, tops' at 4.0 ppm and is establishing an expiration date of December 8, 2025 for that tolerance because it is no longer a significant livestock feed item or recognized human food.
- New Carboxin Tolerances for Several Hays and Byproducts: benefit, medium. EPA proposes new carboxin tolerances: Barley, hay at 0.2 ppm; Cotton, gin byproducts at 3 ppm; Oat, hay at 0.2 ppm; and Wheat, hay at 0.2 ppm. (Also revises 'Canola, seed' to 'Rapeseed, seed' at 0.03 ppm in the regulatory text.)
- Import Tolerances for Thiobencarb on Lettuce and Celery: benefit, medium. EPA proposes to establish import tolerances for thiobencarb on Celery, Endive, Lettuce, head, and Lettuce, leaf at 0.2 ppm and notes there are no U.S. registrations for these commodities (these tolerances are to ensure import coverage).
- Propylene Oxide Crop Group and Commodity Updates: benefit, low. EPA proposes to revise propylene oxide tolerances, including changing 'Fig' to 'Fig, dried' and updating the nut crop group to 'Nut, tree, group 14-12' at 300 ppm (covering previously listed nuts). The rule lists specific ppm for several dried commodities (e.g., Garlic, dried 300 ppm; Fig, dried 3…
- Wheat Hay Tolerance Increase for Flucarbazone‑Sodium: benefit, medium. EPA proposes to modify the flucarbazone‑sodium tolerance for Wheat, hay from 0.10 ppm to 0.2 ppm to support a 15-day grazing/harvest interval.
- EPA Certifies No Significant RFA Impact on Small Entities: benefit, low. EPA certifies under the Regulatory Flexibility Act that this action will not have a significant economic impact on a substantial number of small entities, based on prior analyses and a 2001 memorandum discussed in the rule.

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## Sources
- [2025-10208 on federalregister.gov](https://www.federalregister.gov/documents/2025/06/09/2025-10208/pesticide-tolerances-implementing-registration-review-decisions-for-certain-pesticides-hydrogen)
- [2025-10208 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2025-06-09/pdf/2025-10208.pdf)

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Source: PRIA, https://policyrisk.com/federal-register/2025-10208 (as of 2026-10-29).