Accident Description

Accident: Honeywell Geismar Chlorine and Hydrogen Fluoride Releases

Location: Location: Geismar, LA

Accident Occurred On: 01/23/2023 | Final Report Released On: 05/27/2025

Accident Type: Release

Investigation Status: The CSB's investigation was released 5/27/2025.

A heat exchanger rupture resulted in the release of hydrogen fluoride (HF) gas, chlorine gas, and various other process fluids. No injuries occurred.

The CSB is investigating a second incident at the facility that occurred on June 7, 2024. There was a release of hydrofluoric acid that seriously injured one worker.

 

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