# 2-Butenedioic acid (2Z)-, monobutyl ester, Polymer with methoxyethene, sodium salt; Tolerance Exemption
> **Rule** · Final rule. · Published 2009-06-24 · Effective 2009-06-24 · 74 FR 29979
## Document
- **Document number:** E9-14596
- **Category:** pesticide
- **Federal Register citation:** 74 FR 29979
- **CFR reference:** 40 CFR 180
- **Publication date:** 2009-06-24
- **Effective date:** 2009-06-24
- **EPA docket:** EPA-HQ-OPP-2008-0851
## Abstract

This regulation establishes an exemption from the requirement of a tolerance for residues of 2-butenedioic acid (2Z)-, monobutyl ester, polymer with methoxyethene, sodium salt, minimum number average molecular weight of (in amu) 18,200 (CAS Reg. No. 205193-99-3) when used as an inert ingredient in a pesticide chemical formulation under 40 CFR 180.960. Steptoe & Johnson, LLP, on behalf of, International Specialty Products submitted a petition to EPA under the Federal Food, Drug, and Cosmetic Act (FFDCA), requesting an exemption from the requirement of a tolerance. This regulation eliminates the need to establish a maximum permissible level for residues of 2-Butenedioic acid (2Z)-, monobutyl ester, polymer with methoxyethene, sodium salt, on food or feed commodities.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2009/06/24/E9-14596/2-butenedioic-acid-2z--monobutyl-ester-polymer-with-methoxyethene-sodium-salt-tolerance-exemption)
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