# m-Phthalodinitrile — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side

For m-Phthalodinitrile, pel (mg/m³) is 5, verified against its source on 2026-08-05.

- **Substance:** m-Phthalodinitrile
- **PEL (mg/m³):** 5

## What the source says

> 626175 | | m-Phthalodinitrile | -- | 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/).