---
type: threshold
id: 2-butanone-methyl-ethyl-ketone
asset: workplace-exposure-limits
title: "2-Butanone (Methyl ethyl 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-Butanone (Methyl ethyl ketone) | 78-93-3 | 200 | 590 | - |"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "2-Butanone (Methyl ethyl ketone)"
cas_number: "78-93-3"
pel_ppm: "200"
pel_mgm3: "590"
verified: true
---
**Substance:** 2-Butanone (Methyl ethyl ketone)

**CAS No.:** 78-93-3

**PEL (ppm):** 200

**PEL (mg/m³):** 590

> 2-Butanone (Methyl ethyl ketone) | 78-93-3 | 200 | 590 | - |

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