---
type: threshold
id: methyl-n-butyl-ketone-2-hexanone
asset: workplace-exposure-limits
title: "Methyl n-butyl ketone; 2-hexanone — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side"
sources:
  - https://www.dir.ca.gov/title8/5155.html
source_quote: "591786 | S | Methyl n-butyl ketone; 2-hexanone | 1 | 4 | | 10 | 40"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "Methyl n-butyl ketone; 2-hexanone"
pel_ppm: "1"
pel_mgm3: "4"
stel_ppm: "10"
stel_mgm3: "40"
verified: true
---
**Substance:** Methyl n-butyl ketone; 2-hexanone

**PEL (ppm):** 1

**PEL (mg/m³):** 4

**STEL (ppm):** 10

**STEL (mg/m³):** 40

> 591786 | S | Methyl n-butyl ketone; 2-hexanone | 1 | 4 | | 10 | 40

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