# Ethyl butyl ketone (3-Heptanone) — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side

For Ethyl butyl ketone (3-Heptanone), cas no. is 106-35-4; pel (ppm) is 50; pel (mg/m³) is 230, verified against its source on 2026-08-05.

- **Substance:** Ethyl butyl ketone (3-Heptanone)
- **CAS No.:** 106-35-4
- **PEL (ppm):** 50
- **PEL (mg/m³):** 230

## What the source says

> Ethyl butyl ketone (3-Heptanone) | 106-35-4 | 50 | 230 | - |

## Source

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

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/).