# Methyl ethyl ketone peroxide — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side

For Methyl ethyl ketone peroxide, pel (ppm) is 0.2; pel (mg/m³) is 1.5; ceiling is C, verified against its source on 2026-08-05.

- **Substance:** Methyl ethyl ketone peroxide
- **PEL (ppm):** 0.2
- **PEL (mg/m³):** 1.5
- **Ceiling:** C

## What the source says

> 1338234 | | Methyl ethyl ketone peroxide | 0.2 | 1.5 | 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/).