---
type: threshold
id: 2-hexanone-methyl-n-butyl-ketone
asset: workplace-exposure-limits
title: "2-Hexanone (Methyl n-butyl ketone) — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side"
sources:
  - https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1
source_quote: "2-Hexanone (Methyl n-butyl ketone) | 591-78-6 | 100 | 410 | - |"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "2-Hexanone (Methyl n-butyl ketone)"
cas_number: "591-78-6"
pel_ppm: "100"
pel_mgm3: "410"
verified: true
---
**Substance:** 2-Hexanone (Methyl n-butyl ketone)

**CAS No.:** 591-78-6

**PEL (ppm):** 100

**PEL (mg/m³):** 410

> 2-Hexanone (Methyl n-butyl ketone) | 591-78-6 | 100 | 410 | - |

Source: <https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1000TableZ1>