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

For 4-Methoxyphenol, pel (mg/m³) is 5, verified against its source on 2026-08-05.

- **Substance:** 4-Methoxyphenol
- **PEL (mg/m³):** 5

## What the source says

> 150765 | | 4-Methoxyphenol | -- | 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/).