# Potassium Silicate; Exemption from the Requirement of a Tolerance
> **Rule** · Final rule. · Published 2006-06-14 · Effective 2006-06-14 · 71 FR 34267
## Document
- **Document number:** E6-8939
- **Category:** pesticide
- **Federal Register citation:** 71 FR 34267
- **CFR reference:** 40 CFR 180
- **Publication date:** 2006-06-14
- **Effective date:** 2006-06-14
- **EPA docket:** EPA-HQ-OPP-2006-0299
## Abstract

This regulation establishes an exemption from the requirement of a tolerance for residues of potassium silicate in or on all food commodities when applied/used as a fungicide, insecticide or miticide so long as the potassium silicate is not applied at rates exceeding 1% by weight in aqueous solution and when used in accordance with good agricultural practices. PQ Corporation submitted a petition to EPA under the Federal Food, Drug, and Cosmetic Act (FFDCA), as amended by the Food Quality Protection Act of 1996 (FQPA), requesting an exemption from the requirement of a tolerance. This regulation eliminates the need to establish a maximum permissible level for residues of potassium silicate.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2006/06/14/E6-8939/potassium-silicate-exemption-from-the-requirement-of-a-tolerance)
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