Proposed rule · 2025-08658

Hydrogen Fluoride; TSCA Section 21 Petition for Rulemaking Under TSCA Section 6; Reasons for Agency Response; Denial of Requested Rulemaking

This action announces the availability of the EPA's response to a petition received on February 11, 2025, from the Clean Air Council, Communities for a Better Environment, and Natural Resources Defense Council (petitioners). The petition requests that EPA establish a TSCA rule prohibiting the use of hydrogen fluoride (HF) in domestic oil refining to eliminate unreasonable risks to public health and the environment. After careful consideration, EPA has denied the TSCA petition for the reasons set forth in this notice.