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

For Dibutyl phenyl phosphate, pel (ppm) is 0.3; pel (mg/m³) is 3.5, verified against its source on 2026-08-05.

- **Substance:** Dibutyl phenyl phosphate
- **PEL (ppm):** 0.3
- **PEL (mg/m³):** 3.5

## What the source says

> 2528361 | S | Dibutyl phenyl phosphate | 0.3 | 3.5

## 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/).