# Cobalt, metal fume and dust, as Co — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side

For Cobalt, metal fume and dust, as Co, pel (mg/m³) is 0.02, verified against its source on 2026-08-05.

- **Substance:** Cobalt, metal fume and dust, as Co
- **PEL (mg/m³):** 0.02

## What the source says

> 7440484 | | Cobalt, metal fume and dust, as Co | -- | 0.02

## 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/).