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

For Ethyl butyl ketone; 3-heptanone, pel (ppm) is 50; pel (mg/m³) is 230; stel (ppm) is 75; stel (mg/m³) is 345, verified against its source on 2026-08-05.

- **Substance:** Ethyl butyl ketone; 3-heptanone
- **PEL (ppm):** 50
- **PEL (mg/m³):** 230
- **STEL (ppm):** 75
- **STEL (mg/m³):** 345

## What the source says

> 106354 | | Ethyl butyl ketone; 3-heptanone | 50 | 230 | | 75 | 345

## Source

- https://www.dir.ca.gov/title8/5155.html

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/).