# Methyl isobutyl ketone; Hexone — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side

For Methyl isobutyl ketone; Hexone, pel (ppm) is 50; pel (mg/m³) is 205; stel (ppm) is 75; stel (mg/m³) is 300, verified against its source on 2026-08-05.

- **Substance:** Methyl isobutyl ketone; Hexone
- **PEL (ppm):** 50
- **PEL (mg/m³):** 205
- **STEL (ppm):** 75
- **STEL (mg/m³):** 300

## What the source says

> 108101 | | Methyl isobutyl ketone; Hexone | 50 | 205 | | 75 | 300

## 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/).