---
type: threshold
id: methyl-isobutyl-ketone-hexone
asset: workplace-exposure-limits
title: "Methyl isobutyl ketone; Hexone — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side"
sources:
  - https://www.dir.ca.gov/title8/5155.html
source_quote: "108101 | | Methyl isobutyl ketone; Hexone | 50 | 205 | | 75 | 300"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "Methyl isobutyl ketone; Hexone"
pel_ppm: "50"
pel_mgm3: "205"
stel_ppm: "75"
stel_mgm3: "300"
verified: true
---
**Substance:** Methyl isobutyl ketone; Hexone

**PEL (ppm):** 50

**PEL (mg/m³):** 205

**STEL (ppm):** 75

**STEL (mg/m³):** 300

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

Source: <https://www.dir.ca.gov/title8/5155.html>