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

For Phenylphosphine, pel (ppm) is 0.05; pel (mg/m³) is 0.25; ceiling is C, verified against its source on 2026-08-05.

- **Substance:** Phenylphosphine
- **PEL (ppm):** 0.05
- **PEL (mg/m³):** 0.25
- **Ceiling:** C

## What the source says

> 638211 | | Phenylphosphine | 0.05 | 0.25 | C

## 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/).