# Phosphine; Pesticide Tolerance
> **Rule** · Final rule. · Published 1999-12-29 · Effective 1999-12-29 · 64 FR 72947
## Document
- **Document number:** 99-33332
- **Category:** pesticide
- **Federal Register citation:** 64 FR 72947
- **CFR reference:** 40 CFR 180
- **Publication date:** 1999-12-29
- **Effective date:** 1999-12-29
- **EPA docket:** OPP-300961
## Abstract

Tolerances are being revised and consolidated for residues of phosphine in or on certain agricultural commodities and animal feeds. None of these tolerances are new, although the change will facilitate new application methods. The Agency is merely changing the tolerance expression to eliminate references concerning how the phosphine is generated. The Agency published a detailed discussion of the change in the tolerance expression, including a risk assessment, on June 9, 1999, as a proposed rule.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1999/12/29/99-33332/phosphine-pesticide-tolerance)
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