# Hydrogen fluoride, as F — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side

For Hydrogen fluoride, as F, pel (ppm) is 0.4; pel (mg/m³) is 0.33; stel (ppm) is 1; stel (mg/m³) is 0.83, verified against its source on 2026-08-05.

- **Substance:** Hydrogen fluoride, as F
- **PEL (ppm):** 0.4
- **PEL (mg/m³):** 0.33
- **STEL (ppm):** 1
- **STEL (mg/m³):** 0.83

## What the source says

> 7664393 | S | Hydrogen fluoride, as F | 0.4 | 0.33 | | 1 | 0.83

## Source

- https://www.dir.ca.gov/title8/5155.html

Last verified: 2026-08-05. Review by: 2027-08-05.
Part of [US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side](https://referencesource.org/workplace-exposure-limits/).