# Graphite, natural respirable dust — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side

For Graphite, natural respirable dust, pel (mg/m³) is 2.5, verified against its source on 2026-08-05.

- **Substance:** Graphite, natural respirable dust
- **PEL (mg/m³):** 2.5

## What the source says

> 7782425 | | Graphite, natural respirable dust | | 2.5

## 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/).