# Mercury alkyls, as Hg — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side

For Mercury alkyls, as Hg, pel (mg/m³) is 0.01; ceiling is 0.04 mg/M 3; stel (mg/m³) is 0.03, verified against its source on 2026-08-05.

- **Substance:** Mercury alkyls, as Hg
- **PEL (mg/m³):** 0.01
- **Ceiling:** 0.04 mg/M 3
- **STEL (mg/m³):** 0.03

## What the source says

> 7439976 | S | Mercury alkyls, as Hg | -- | 0.01 | 0.04 mg/M 3 | -- | 0.03

## 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/).