# Lambda-Cyhalothrin and an Isomer Gamma-Cyhalothrin; Tolerances for Residues
> **Rule** · Final rule. · Published 2004-04-08 · Effective 2004-04-08 · 69 FR 18480
## Document
- **Document number:** 04-7979
- **Category:** pesticide
- **Federal Register citation:** 69 FR 18480
- **CFR reference:** 40 CFR 180
- **Publication date:** 2004-04-08
- **Effective date:** 2004-04-08
- **EPA docket:** OPP-2004-0025
## Abstract

EPA is amending 40 CFR part 180 by promulgating a new tolerance expression for the isomer form of gamma-cyhalothrin. Gamma- cyhalothrin is the isolated active isomer of lambda-cyhalothrin under 40 CFR 180.438. Pytech Chemicals GmbH, 9330 Zionsville Rd., Indianapolis, IN 46268, requested this change in tolerance expression in support of the registration of a pesticide formulation enriched with the gamma isomer of lambda-cyhalothrin.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2004/04/08/04-7979/lambda-cyhalothrin-and-an-isomer-gamma-cyhalothrin-tolerances-for-residues)
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